As has already been said, talking to a priest would be a good idea.
As for my own opinion on the matter, I believe this: In no way, shape, or form does love require an emotional feeling in order to survive…at all…ever. The emotional feeling may go with it (and it’s very good if it does as it makes love easier) but love is a choice, an action, something you do not something you [necessarily] feel. Consider, God commands us to love Him, and to love others. We vow that we will always love a spouse when we marry. If love is something one can be commanded to do, something one can vow to do, it must be something we can do willingly. Yet we all know that we cannot always control what we feel; thus love cannot be something so uncontrollable as an emotion.
It seems to me that love, at least as a Christian is commanded to give it, is defined by committing yourself to the well-being of another, regardless of if you feel mushy, romantic, or completely emotionless about it. If you commit to sincerely caring about a poor person’s well-being, for instance, you are loving that poor person, whether you have the slightest hint of emotional attachment or sentimentalism. It is the same with God. It is a little different, as God is not like a person in terms of “being in need” but loving Him is still something one makes a choice to do, not something about which one is at the mercy of fleeting emotions or feeling “the magic” of the relationship. One loves God when one chooses to continue to serve Him, when one chooses to do those things which give Him glory, when one chooses to pray even if the prayer feels dry, when one chooses to recognize that God is great, glorious, and beatiful even if one isn’t feeling those things on an emotional level. Basically, in choosing to live [or try to live] a good Catholic life for God out of sheer loyalty to Him [even if nothing else], one is loving God.
If more people in our modern world knew what love truly was, assuming many of them truly want to maintain it rather than just offering it lip-service, divorce rates would plummet to a happy low and “loveless marriages” would only exist for those who wanted to give up. It is the same with religious commitment and religious love. It seems like you do love God, but at this point, whether it lasts only a while or indefinitely, you simply don’t have the emotional feeling often associated with love. Your emotions may be dead right now…but love is a choice, defined by commitment and action, not feelings, and so love is dead only if we choose for it to be so.
Continue living a good Catholic life, and do it because God wants you to do so. Continue to love * others, knowing that they are made in the image of God. Continue to read Scripture and reflect on Catholic Truths, valuing them as God’s word, even if Classical philosophy attracts you more (this doesn’t mean you can’t ever read Classical Philosophy, just commit to also reading Scripture and studying the Faith, and acknowledge these as objectively inspired, beautiful and sacred even if you don’t feel it on a subjective level). Continue to acknowledge God’s glory even when it doesn’t inspire emotional awe in you. Continue to pray, talking with God even when you don’t feel like it, just as you should with a beloved family member no matter how dry you feel, if you knew that family member deeply wanted to hear your voice. Determine yourself by choice, with such a strong will as to surpass stubborn, to never give up on your relationship with God, and make keeping your faith and supporting Him and His will your highest priority, something you refuse to abandon no matter what else “feels better” or how emotionally dry or cold you may feel. This last factor that I have just mentioned is essentially loyalty, which in my opinion is the defining trait of love, and loyalty is something you choose and continually renew with complete freedom, not something that comes and goes without your willing it to be so. And loyalty-based love, when fully appreciated for what it is [as is rarely the case in our age], should be far more flattering to the beloved than emotion-based love ever could be.
If you do these things, it is my opinion that you are loving God even if your emotions remain completely unmoved. In fact, due to the difficulty of loving in the absence of fond emotions, the love you will be offering God may be far superior, since it is then something you will be giving willingly and from the soul, despite all difficulty involved, instead of something inspired and made easier by forces beyond your control, namely emotions and “feeling” like the love is there. Feel free to pray for the emotions [but do not demand them and do not allow yourself to believe God is “letting you down” if they do not come], and feel free to seek to encourage them in yourself through reflection and such, as that is well-intentioned, but do not confuse desiring the emotion in good intention with needing the emotion as if your love isn’t real without it. I simply don’t believe that is true at all.
Please do not despair by allowing Satan to trick you into thinking you have “lost” the love. It is not something that can be lost, only thrown away willingly. And based upon your post, it doesn’t seem you have willingly done so. There is nothing immoral nor even, in the true sense, cold about continuing to remain committed and loyal to God [essentially, continuing to love Him] in the absence of feeling affection. If anything, it may be all the more noble to do so even despite the lack of emotional incentive.
You will be in my prayers, and may you make the choice to never stop loving our Lord, Who is worthy of love even when we do not feel like giving it. I hope this is helpful.
Blessings in Christ,