<human>: Can you provide a brief overview of the text?

We have been dating for just over 3 years now, and from day one her ex has been in her life. I'm normally not a jealous person and she's free to talk to whoever she wants, but her ex makes me so uncomfortable. Sometimes he'll call her up to go out to dinner and they won't get back home until late, and 90% of the time he's rude to me. My gf says he's just fooling around. He calls her all the time and when they hang out at our place they always talk about ''old times'' and are very touchy feely.

Their closeness is making me paranoid. I don't want to be that annoying jealous boyfriend, but I do want to confront her about the situation since it does upset me. Any advice on how I can approach her without looking like a dick?
<bot>: my girlfriend is still very close to her ex and it upsets me, how can I discuss this with her without being an asshole?