DP has a new female friend he has everything in common with

[Peanutbuttttter]

And I have no intention of saying anything, that's never been an issue in our 3 year relationship, but I feel insecure. It's a woman he's met recently, who I think is a couple of years younger than me (I'm 36)

Me and him do have things in common but he has 2 hobbies I'm not very interested in, equally I have a couple of hobbies he doesn't fancy doing. However we still show an interest and ask about them etc. Just not things we'd do ourselves.
A record store/café type place opened recently and this woman works there. They hit it off and have agreed to do one of their hobbies together (with a few other people) he did invite me and he has never done anything untoward.
Just what makes me feel insecure is that they literally have every single thing in common, those hobbies he does, she does them too, both very into piercings and tattoos, i am but not to the extent they are. Both share the same music taste whereas mine and his has some similarities but differs a little.
We're getting married in a year so surely he wouldn't throw all that away? I found her social media (i know) and she was engaged to a woman previously, so may be gay, but she may be bisexual, it's no guarantee, I don't even know if she's single.
I just worry he might realise he has far more in common with her and she's also his type physically, plus seemingly younger than 36.

Again I've no intention of saying anything and there's nothing I can do, just got to deal with it. I've just heard stories where people were happy or so they thought, then just met that person who made them think otherwise and left for them (someone did this to me in my 20s). Advice on feeling more confident?

I'd be worried about the similar taste in music, but that's because music and politics are my two non negotiables. Dh and I deviate a bit in music, but largely agree- we have music playing all day, so it's important.

I made a new male friend at a party, a few years ago. We just clicked. We bet quickly introduced our partners abs did stuff as a group though. Dh knows we message one another, but that's mainly because I tell dh what we message. I think dh would have been twitchy if I'd suddenly started doing a hobby with said bloke, just as I would if dh suddenly made a new female friend.

Don't get wrapped up in relationships and don't get married. If you want to stay together you will, if you don't you won't. Share as few contractural/financial responsibilities as possible so that there is minimum legal aggro as possible if it goes wrong. If you are proper mates you'll still be together in 30 year's time. Plenty of punani will keep him around

Men don’t always fall for women who like their hobbies. Look up “pickmesha”

anway assuming she genuinely is interested in these masculine hobbies, it will not necessarily attract him. He either loves you or he doesn’t. If he is going to run off with the first person he comes across who likes warhammer or football or whatever then it’s not someone you’d want to be married to anyway

It's not nice but you're marrying him and have to trust him. He hasn't done anything to you and if he does than you know he isn't the one