Most Helpful Guy
Don't worry, your explanation isn't very long and it's very detailed. I love the good explanations like this. First off, it looks like they both still like each other. Well, at least to an extent. I don't think that he likes her as much as she likes him. I can tell that it's really bothering you, though. If I were in your situation, here's what I would do:
I would take him aside or something--or whenever you talk next time--and tell him how you feel about the situation... "You know... I have a problem. Your ex-girlfriend seems to really dislike me and it looks to me like she still wants to date you. I feel hurt and uncomfortable %sub more feelings% when this happens. If this continues to happen, will it make our relationship better or worse? Do you want our relationship better or worse?"
Note: Remember to use "I" messages.1