Girls being flirtatious with my boyfriend on twitter/fb? Would you be uncomfortable?

[Amy]

On twitter she calls him her boyfriend and leaves hearts on his timeline. And he called her love. I think it's disrespectful. I confronted him about it and he said it's nothing she's just young and has a crush. She's in highschool, and we're 19, by the way. But they talk on the phone and text, too. And I'm like, what could you need to talk to a 14 year old about when we're adults. The whole thing makes me uncomfortable. I know he isn't cheating, at least not physically, but what is he doing? I do have trust issues, as he's been dishonest in the past. But am I overreacting? And what should I do?

Also, I feel like he isn't letting it be known that he's in a relationship. I don't even have a twitter or fb (they cause too much drama) so it's not like anyone knows about me unless he says so. And other girls leave flirtatious comments too but she's the main one.

How would you handle this whole situation?

[Veronica C]

I would move on. He's a major tool...