<human>: Give me a shortened version of the text

In a week and a half, I leave for a trip for five weeks. We have been going back and forth on opening things up to extracurricular sex while I'm gone, but when I really imagine it happening, I'm devastated. Since Tuesday, those loving feelings have been gone from my side and I can't access that warm, safe, connected space with him anymore.

When I make it okay in my head for him to sleep around, he starts to feel like just my friend. When I try and think of him as my boyfriend and imagine him sleeping with other women, I'm crushed.

Last night we talked until 2:30am and he said that he's going through a mid-life crisis type thing and he has to do this for his self-esteem. That if the five weeks pass and he doesn't actually pick up any ladies and isn't successful, then he'll feel really bad about himself. This makes me feel just awful to hear for I don't even know how many reasons.

Part of me wants to tell him, "Sure, you can sleep around while I'm gone, but I'm not your girlfriend when I'm gone." I feel like he wants it all and it doesn't matter if it's at my expense. But what I really want is to feel in love again and to have everything right between us. It sounds to me like he'll resent me if I don't let him do this.

What would you do? Is sleeping around while people are out of town not really that big of a deal? Is this super common? How do you truly stay in love with someone while you know they're pursuing and sleeping with other people?
<bot>: My boyfriend wants us to sleep around while I'm gone for five weeks. When I agree to this, I lose my feelings for him. He says it's for his self-esteem. I need some perspective. Help?