<human>: Give me the gist of the text in a nutshell

I've been dating my boyfriend for over 7 months. He moved back to Illinois the end of May. We've been doing the long distance thing since. There have been bumps in the road because of the distance, but everything seemed to have worked out. I've visited a few times and it was great, except for an incident where one of his female friends got too close for my comfort (leaning into his lap and excessively touching him). He didn't see anything wrong with this at first, which really upset me. We talked about it and he said he'll make an effort to be more aware of what things might make me feel uncomfortable. I give him that same courtesy. Fast forward to tonight... He tells me that he is having a few drink with a female friend from out of town. I tell him to have fun and what not. He begins to sends me flirty sexy messages. I begin to get uncomfortable with this. Why? Because he is drinking and he's thinking about sex. I've had ex-boyfriends cheat on me in the past. It hurt like a bitch. I've spent 3 years dealing with that emotional baggage and I've gotten better with my insecurities, but I can't help shake it all. I know I trust him, but I feel so unsure. Why can't I not be upset with this?
<bot>: Been cheated on in past with previous boyfriends. Boyfriend has had an incident where female friend was too flirty with him. He is drinking alone with another female friend and sending text talking about sex.