I don't believe in god anymore, help?

Okay, im a 16 year old guy.. and a confirmed catholic. Over the past few years, though, I have realized that it is impossible for there to be a god and it would be foolish to half-heartedly and fake believe something. Therefore, I have come to the conclusion that there is no god. I believe that a person should do the right thing BECAUSE its simply the right thing to do, not because some oppressive god threatens you to. I truly want to regain my faith because my father died when I was 3, and other family members.. and I really wish there was a resting place for them, and a better place than just being here on earth. In my heart of hearts, though, I firmly believe (at this present time) that there is no god and religion can just be a destructive force and creates conflict more times than not. Also, I dont understand how religion can explain the age of the earth, and other things that have completely contradicted the bible. I feel like firm religious believers just say "you have to have faith and not question god" to get around any flaw or proven mistake detected in the bible. Also, according to christianity, if someone really doesnt believe in god at all, but lives a very good life in which they help and care for other people, and constantly do the right thing, are these people condemned to eternal doom in hell? I dont understand how someone can call that god "merciful and forgiving".. I really DO want to regain faith, however, because I want to believe there is more to life than what meets the eye.. so can some stern religious people try to sway me, and help me out?