Hey everyone, I really need to get this off my chest and maybe hear some advice or just some perspective. So, my girlfriend (26F) and I (27M) have been together for 2.5 years now: a solid, healthy relationship, with ups and downs, of course. We talked about a lot of deep topics as in life goald, cheating, respect, freedom, etc. over the years and we both align really well. We also had some arguments, mostly petty stuff or occasional jealousy, but overall it was fine, until about 6 months ago when we went long distance. Afterwards the jealousy on my side has just skyrocketed. This post is really about one particular friend let’s call him Milo (26M). Milo is more like an acquaintance. He’s just a classmate of hers, not really a close friend.
But here’s what happened: the last time they went out, it was just for coffee, and it was a weird mix of topics: tarot cards, horoscopes, relationships, but also some very personal stuff, like Milo talking about his parents catching him masturbating. My girlfriend and I both thought it was just odd, but we brushed it off. Then last night, they went out again with a group of friends (six), and it went late until 2:30 a.m. During that time we texted where she mentioned how drunk Milo was as he will graduate soon and paid for everyone's drink which my gf was impressed with. They also had an accident while dancing where Milo bumped his head on hers and she accidentally pricked him with her thumb, this made her really scared and she was constantly checking on him. Afterward, Milo walked her home. She texted me at 5:30 am in the morning, saying they just stayed near her house talking for 1.5 hours, both of them very drunk.
To top it off, earlier she a comment by her really made it uneasy for me, Milo and her were talking about gym and Milo exercises in the park where she gave him a backhanded compliment how he's lucky to not feel insecure gymming in the park (he's fit and good looking).
Now I was cheated on in the past where I developed a lot of traumas leading to introlerance for certain situations that make me feel that way.
How to handle this situation?
TL;DR: Dealing with a situation in LDR that's making me feel really jealous and bad. She went out with a couple of friends last night and ended up coming home at 5 am (she was talking with a particular acquaintance, both drunk, for 1.5 hours early into the morning) and it's making me feel uneasy.