A bit confused 😕

My partner & I have been together for 4 years, & I love him a lot & don’t wanna hurt his feelings or make him feel like I’m in attracted to him/don’t wanna be with him anymore. I am bi, & have know this since way before we met, & he knows & has always been very supportive about it. When we first started dating, I definitely leant more towards guys but sometimes I feel like I’m way more attracted to women. Most of the time it’s just for a week or so, so I don’t think much of it. But recently I’ve been feeling like I am way more attracted to women than men. Not that I’m not attracted to him, I just feel like there has been a very drastic shift, that I feel a bit lost??

There is a girl at work, I don’t talk to her much, but have worked closely with once but otherwise we don’t usually work together, based on the roles we have each day. But I have a bit of a crush & I don’t necessarily think having a crush is cheating, assuming you don’t act on it. I think it’s normal to get crushes every now & then (if you personally believe it is cheating, I respect that, but please also respect how I feel). But the part that is kinda messing with my head a bit, is that I’m not feeling as sexually turned on by him recently. I’m sure that it is just a phase I’m in, possibly hormones etc I’m not sure.

I changed to the IUD at the end of 2022, & I’m wondering if that might be messing with hormones or something. My sex drive has definitely felt lower recently, but it is also nice not having to worry about accidentally falling pregnant (as we are not in the position to have a baby atm). (Also note that when I was on the pill, my sex drive also went down. So it’s not just iud, it might just be bc in general for me)

I guess my question is, has anyone else had a similar situation, & what should I do about it. I don’t know if it’s worth bringing up & talking about it or if I should just see if it passes.

If I should talk to him, any advice? I don’t want to upset him or make him think I’m leaving him. I just feel a bit out of my depths with this atm, so some advice would be great.