i think you may need to make a serious effort to determine which church you believe to be true first, through some theological and historical study. if you believe that that the Church is true, then it makes it easier to deal with feeling somewhat unwelcome, because you aren't there to feel welcome primarily, you're there for a true encounter with Christ.
i believe that the Catholic Church is true and thus i am a Catholic. i am sort of weird and don't fit into social situations very easily. through studying the bible, theology and church history though, i came to believe in the sacraments, and so i knew that despite not really fitting in, i needed to be baptized and then start receiving the eucharist. after a while i found a group at my parish that meets on thursdays for adoration and rosary and now i can say i have friends at church, but that wasn't immediate and wasn't my primary reason for being there.
obviously i think that you should continue to be Catholic, but more than anything i think you should come to an understanding of the importance of the sacraments and being part of a legitimate, sacramental and apostolic church. trust me dude i don't like the social cliqueyness either, but unfortunately almost every church has that crap. pray the rosary, read your bible, and seek our lord Jesus Christ in the eucharist, he's there even when the congregation is unfaithful, even if the priest isn't good, even if the liturgy isn't celebrated as reverently as it could be.
check out this link for a ton of info on the eucharist from the church fathers. it's hard dealing with the social bullsh*t that goes on in churches but you're supernaturally connected through your baptism to countless brothers who struggle with the same thing, myself being one of them. and disregard >>780994 this fgt knocking on you for being ethnically jewish or whatever. god bless you man.