Is there a branch of Christianity that doesn't view homosexuality as a sin?
Read Romans 1:18-32 and the verses listed here and tell me what the Bible says. That should let you know what stand a Christian would take on homosexuality. If you choose to reject Christianity over that, it's your call, no one can stop you.
Do some people re-interpret the Bible to say homosexuality isn't a sin? Yes. I would caution against that, again, the Bible itself warns against misusing it.
2 Tim. 4:3-4 (ESV) For the time is coming when people will not endure sound teaching, but having itching ears they will accumulate for themselves teachers to suit their own passions, and will turn away from listening to the truth and wander off into myths.
I probed her on some of the other laws like 2 cloths, dietary restrictions, and being forced to marry your rapist. She said there were 3 types of rules and we don't follow civil laws because they changed and Jesus eliminated the need for sacrifice and punishment, but the sexual perversions still got you a one way ticket to hell.
Your friend is right. Acts 10:9-16, Peter's vision where he's told to eat unclean animals and Galatians 5, where Paul tells Christians to not get circumcised, make it clear that all of the OT laws don't apply to us. However, Christ said He came to fulfill the law, not destroy it, so clearly we can't throw out the OT wholesale. Commands against sexual immorality (not just homosexuality) are found in the OT and NT, as I demonstrated above.
I refuse to believe that God would make him gay only to send him to hell for it.
We are all sinful by nature, by birth. Some of us struggle with homosexuality, some with lust, some with anger, some with lying, some with stealing. Homosexuality isn't in some special category all by itself. We are all born with a sin nature but we can find freedom from that sin nature in Christ Jesus.
If I didn't want my brother to go out and get drunk, would that mean I hate him or hate alcoholics? Of course not. So if I didn't want my brother to live a homosexual lifestyle, would that I mean I hate him or hate homosexuals? Of course not.