Is it normal to feel jealous when your significant other has a close friend of the opposite sex?

I’m sure many of you have read my past posts before about jealousy. For those who haven’t, I’ve been with my bf 3 years and 2 years long distance. He moved didn’t have friends…and then he joined the Army Reserve and made friends. He had a bunch of guy friends at AIT (training) but they don’t live where he lives…but two girls do.

I’m more so concerned about one particular girl he’s really close with. I’ve met her once and they get a long really well. They are in the same company, unit, they’re going to airborne school, language school, and be deployed together. He hangs out at her house all the time and usually there is some kind of party she is throwing. He is always hanging out with her…he claims it’s completely platonic and that it’d be weird if he dated her and it’s just not like that.

I’m not afraid of him cheating on me…I just hate how super close they are it’s like she’s his 2nd girlfriend. She’s engaged though, her fiance is deployed and when he comes back they’re getting married. I know you’re all thinking “What the hell are you worried about if she’s getting married!?” but it just sucks to see him and his two female friends’ pictures plastered all over Facebook partying and having a good time when I’m not there.

Part of me wonders why is he still with me when he could be with her. They get along so great and have fun…it’d be easier for them to date.

Anyone else have a significant other with a close battle buddy??

edit he also spends the night at her house sometimes…the girl’s fiance knows this. He doesn’t like it but it’s not a big deal to him. My bf stayed the night while he visited anyways..