I think someone has their eye on my boyfriend.

So we’re 17 and 18 and sexually active.Obviously every single girl likes him he’s handsome. I saw him chatting to.a girl a few days ago.Why do I always fall for the idiots?He’s mine and everyone’s just flirting with him.He said he loves me and only me.My type is the bad boys but some bad boys are just not worth it.Everyone keeps saying maybe he’s not the one but i want to be the one i’m so inlove with him.I want too spend my life with him.He said he’ll tell them to look for someone else.