What do I do?!?

Josceline
My Boyfriend has a friend Julia. And I really like her. We are good friends and text all the time. We talk more then they do. But whenever she is around she every touchy with my boyfriend. Bugs the crap out of me! I know she just a really flirt person but still. I trust my boyfriend 100% but I don't really trust her. 
Graduation she took some pictures with him. And she put it as her profile picture. Really makes me jealous because like that's my boyfriend. She has other closer friends who have just graduated.