I think that I can relate to what you are going through. I can’t specifically pin point what is going on, but you may suffer from a form of depression. Maybe you just notice it more because prayer is giving you joy that you don’t ordinarily feel. I think that you deserve to be joyful and if you need a counselor to help you with the feelings of depression, seek one immediately. You can try searching for one at a website such as catholictherapists.com or wellcatholic.com. If you have insurance, call your insurance plan and make sure that whoever you choose from the websites above are participating providers in your plan.
Also, I suggest you to talk to a pastor or priest in addition to a counselor, because there may be a spiritual cause to the way you feel. I would talk with a counselor and a pastor, not either or. Seek some support now so that the feelings of depression don’t linger and become worse. It’s better to get support now than later. Pray for guidance, ask the Lord to help you to find the counselor and priest which He knows will best support you. Make sure you don’t keep these feelings to yourself.
I’m not a counselor or priest, but maybe try to do things that make you happy every day. Listen to your favorite music, see friends and talk to friends often, get out and take a walk or visit a store, eat some healthy comfort food, take a class, be involved in hobbies which bring you happiness, and keep praying. Keep praying no matter how you feel. Don’t isolate yourself, because that is a temptation and is not from God – I cannot stress that enough! Even if you don’t feel like socializing with friends, socialize! We were made for communion with others, and when we isolate ourselves we can be depressed. Even if you can’t see your friends or talk with them every day, get out and be with people! It does help.