✋🏼 &((((HUGS))) if you'd like some.
its very very hard.
maybe he's had his head turned by another woman or maybe he just sees his new friends being young and carefree, going out, having fun & no/little responsibility and wants some of that for himself instead of worrying about ivf and other 'grown up' things.
who knows?
the pain is real whatever is causing it.
my advice would be to sort out practical things. He needs to move out (you don't want him to I'm sure, but he can't live there enjoying all the home comforts while 'being single'. That will just hurt you over & over (even if you want him to stay & even if you think you can cope). Start building your own life going out with friends, taking up new hobbies. Don't wait around hoping he'll come to his senses! (Tempting though it is)
he says he loves you (which is what you want to hear) but what you NEED to hear is him not wanting to be in a relationship with you & not even telling you why?? He's putting you into ' fall back' mode so if his new attraction/new friends doesn't work out, he knows he has a safety net. Thats not loving you.
knowing what I know now (55 been through a bit!!) even if he begs you to take him back I wouldn't (anymore! I learnt the hard way).
once he's fucked the trust you had in the relationship being solid, it's gone forever. It's likely he'll do it to you again too.
im really sorry about the IVF, but in all honesty, not having kids with him is a blessing in disguise. You only have you to worry about.
what's the housing situation?
you have my thoughts & support no matter what you do. I hope I can help you not make my mistakes, but sometimes uou just have to make your own mistakes. I didn't listen to anyone 🤷🏻♀️🙇🏻♀️ I thought we were 'different' I thought we had 'something special' and it was long before MN. I wish I'd had MN's words of wisdom & that I'd listened!! I'd have wasted much less time & had a very different life/outcome.
Look after yourself xx