Search Results: hanging out with friends high school

I know you guys won't know the exact answer but what do you think?
My bf, of 2 years today, was apparently seen by my step dad being "touchy" with another girl, and he said my bf was also with one of his friends (he didn't explain what he meant by "touchy" though). And just for the record, my bf and I live in different counties, we're still in high school, but we met at church (so we only get to see each other on Sundays) and I have family down where he lives and my step dad works down there as well. So I confronted my bf about it and he said that he was hanging out with his sister and his friend who I've met before and, referring to the "touchy" part, he said he had been rubbing her arms because she was cold and he was tryna warm her up. I said ok to that. My aunt who lives down there near him said that she saw him coming from the park with a girl and again he said it was his sister (we don't know if it was the same girl though according to my aunt and step dad). Now here's the other part, even though I know my family wouldn't lie to me and they want me to be happy, nobody in my family likes him and honestly they don't really have a reason not to. They always tell me I can do better and that he will break my heart, and they tell him that I will find someone better and leave him. The biggest people who keep saying these things are my mom and my grandma cause to them, since we are still young (we're both 18) we don't know what love is and we will never last, although I know that this is their opinion shouldn't they at least try to support me instead of causing more stress to me and him? Anyway, from this information, what do you people of GAG think? Is my boyfriend, whom I love and don't want to leave, cheating?

ps - I may be seeing him today and I kinda want to talk about it, but then again it is our 2 year anniversary. Should I talk to him about this or wait?