Should you support someone even if it upsets you?

My girlfriend and I have been together for 4 years and we are basically each others best friend. However a few months ago we took a break from the relationship for about a month. we realized how much we missed each other and got back together. Now our relationship is better than ever. There is just one problem - during the break my gf had a fling with another guy for about a week. At first she had fun with him she ended up regretting it a lot. Since she is my best friend and wanted to talk about it, I said ok- I guess i wanted to know what happened too. At first he was really nice, but then she realized he was just using her for sex. At first he worked hard to please her, but soon he changed and would just do what he wanted and was very selfish in bed, she says he wanted to do it very often, but would finish very fast, which made her feel used. I want to be there for her, but hearing about it makes me jealous and a bit angry she let him use her. but so far ive just supported her.Should you support someone even if it upsets you?
I have been around the block more than a few times, and I still feel twinges of jealousy over guys my partner had sex with when he talks about them, and we've been together over 8 years. It's normal. Just be honest with your feelings so that you don't build up a resentment. If talking about it get to be too much, don't feel bad about saying that it's more than you can handle right now. Continue to be supportive; hopefully she learned a lesson. It's pretty raw for you right now since you just got back together, and it's natural to feel a little cheated on, even though you were taking a break. She's back with you, though, and that's what counts. Keep your focus on that.Should you support someone even if it upsets you?
let it go
She goes off, has a fling, then comes back to you... sounds like you are the one being used.