Confusion

I’m confused. I like someone, like really like someone, and he likes me back, but what does it mean when you guys walk together, and he sees one of his friends that’s, mind you, a girl and he walks with her instead? Does it mean he likes her as well or not? I need help figuring that out because if he’s gonna like me and like other girls at the same time, I don’t fuck with that. Just seeing him makes my day. Talking to him makes my day. I really like him, but the thing that I’m scared is going to happen is that if he and I get together, he’s going to end up cheating on me with one of his female friends. I’ve had bad experiences with my past relationships, getting cheated on multiple times, them leaving me for no reason, or them just randomly leaving. I always end up getting so attached to them, and then they promise that they won’t break my heart, and they do it anyway. I hate relationships. There’s no point in being in a relationship if I’m just gonna get cheated on. I’m done. I’m just done loving people because there’s no point.