You are still quite young and certainly do not make a major type decision while feeling confused on an issue. Talk with this young man about what it means to you to be Catholic in every way including, if you are talking about marriage even in an objective sense, what it would mean to you to be a Catholic marriage partner - Mass, Confession, raising children Catholic, your position on birth control etc. etc. I think you will find that this will be an unfolding issue for you - take one step at a time and let it unfold and strive to keep your soul in Peace, pray about it all and trust The Lord to guide you. And don't make a firm decision while confused - pray and wait for clarity as you take one step at a time and allow the matter to unfold.
Best of all would be to seek some sort of spiritual direction. Few, very few, are skilled at looking at themselves purely objectively and unearthing all the issues etc. with accuracy. A spiritual director can do this for you. You could speak with your parish priest via appointments and ask if he can assist, you could phone your diocesan offices and ask how you would contact a spiritual director. Sometimes religious orders of priests and/or brothers can help as can sometimes religious orders either active and/or contemplative.
I think you might need spiritual direction to help you discern out where you are at in actuality and the way forward.
My best friend's parents got married when her mom was an atheist, and now she is a very devout Catholic.** I feel like that's atypical though and I can't go into a relationship hoping that will happen.**
Very wise indeed.
Maybe I'm just having trouble accepting the fact that this guy is not meant for me and I'm looking for loopholes. =/
This could be so - it may not be so. This is where spiritual direction can help. But I do suspect that you made the statement for a reason; however, I am not a spiritual director.
I hope other members may be helpful to you.
Marriage is meant to witness to The Church that Love that Christ has for His Church. Marriage is a Sacrament and all the Graces neccessary are bestowed. But it is a huge role for both partners in a Catholic Marriage. This is what St. Paul had to say:
Being subject one to another, in the fear of Christ.  Let women be subject to their husbands, as to the Lord:  Because the husband is the head of the wife, as Christ is the head of the church. He is the saviour of his body.  Therefore as the church is subject to Christ, so also let the wives be to their husbands in all things.  Husbands, love your wives, as Christ also loved the church, and delivered himself up for it:
 "Church is subject to Christ"... The church then, according to St. Paul, is ever obedient to Christ, and can never fall from him, but remain faithful to him, unspotted and unchanged to the end of the world.
 That he might sanctify it, cleansing it by the laver of water in the word of life:  That he might present it to himself a glorious church, not having spot or wrinkle, or any; such thing; but that it should be holy, and without blemish.  So also ought men to love their wives as their own bodies. He that loveth his wife, loveth himself.  For no man ever hated his own flesh; but nourisheth and cherisheth it, as also Christ doth the church:  Because we are members of his body, of his flesh, and of his bones.  For this cause shall a man leave his father and mother, and shall cleave to his wife, and they shall be two in one flesh.  This is a great sacrament; but I speak in Christ and in the church.  Nevertheless let every one of you in particular love his wife as himself: and let the wife fear her husband.