<human>: Because of 2 past relationships where I was cheated on and 1 where I dated a girl who was cheating on her boyfriend (I didn't find out until after we broke up) and various issues throughout my childhood, I have minor trust issues in general and some deep rooted trust issues when it comes to relationships. I love my girlfriend, and she has given me no reason to distrust her but every now and then I can't shake the idea that she might be cheating on me.

She knows I have baggage but I haven't voiced my concerns, because I feel she won't feel like she's able to talk to me about stuff. Sometimes I feel like a jealous bastard. The only thing that's tangible and could realistically be an issue is that she's still close friends with her ex who has admitted to having feelings for her. They're childhood friends and he has known her far longer than me, so I can't really express concern or dislike for there friendship without coming across badly.

I feel like this gnawing feeling at the back of my mind won't go away. I trust her not to cheat on me, but it's not enough to stop me being concerned. Does anyone have any advice or tips on how to help me get over my trust issues?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I have trust issues from past relationships and I need to get rid of them so they don't affect my current one.