Does she have a history of cheating?

No that I know of, from she shes told me shes only been with 4 people since she was 16, I'm her 5th.

Does she have bad judgement and poor decision making skills?

I don't think so but she can be a bit rude towards people.

Does she have poor self control?

Again I don't think so.

You know your gf and you know what she's capable of. If you don't trust her, move on.

I like to think I trust her but I don't trust her ex boyfriend or her friends as they all keep suggesting that she should get back with him but she's told him and them that she doesn't want to get back with him and that she just wants to be friends with him but her ex and her friends do seem fairly pushy and actually make her feel bad at times for wanting to spend time with me.

Sometimes I feel like shes stuck in the middle of them and me and that she litterally has to decide who tospend time with and sometimes when were together they pretty much non stop facebook messenger her, call her ect to see whats shes doing even though they know shes with me, its gotten to the point twice where she acutally turned her phone off so we could chill without her phone going off.

All her friends are around her age of 20 and all my friends around my age of 25 but I feel that my friends are a lot more less involved with my life and if I tell em I;m busy ect then they just leave me to it till the next day but her friends aren't like that at all and its fucking annoying as shit.