Right now I am in a relationship with someone I really like but don't know if I can trust. Whenever we are out, his phone rings all the time. If it's one of his friends he'll answer but if it's someone else he won't. I think that "someone else" might be another girl. When I look at his phone I see another female's name in there and when my little sister plays games on his phone and someone is calling him, she tells me a girl's name pops up. What should I do or say? I really like him and he took me home to meet his mom.