<human>: So the boyfriend [19M] and I [18F] have been together just under a year. I've known my friend [18F] for years, and she really is lovely. Except that she confessed her love to my boyfriend.

The two of them are close friends. They go to the same college, whereas I go to different one. (We all live close to one another though). They spent their days side by side. At parties, they spend a lot of time together, and when there's alcohol involved, they can get a bit handsy with one another. I've observed groping.

Now, I've been the victim of a crazy girlfriend before (as in, been friends with a male who has cut ties with me due to their girlfriend's jealousy) and I really don't want to be like that. I'm fine with them being friends, and even her having feelings for him. You can't help that. I just get uncomfortable with them being flirty, especially when they do this while I'm around and my friends start to 'warn' me about them.

He tells me that he doesn't have feelings for her and that he loves me. I believe that latter half completely, but I'm beginning to doubt the former. Am I justified in thinking that this is an issue, or should I just trust them both and get on with it? I love him, and I don't want to ruin my friendship with her. I also don't want to sound like an eighteen year old taking her love life too seriously.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: My friend has feelings for my boyfriend. They flirt a lot and spend all their time together. Am I justified in being cheesed off or am I a crazy girlfriend? Should I do anything about it?