Constantly cranky and upset

I’m really struggling with not snapping at and being angry or upset with my partner lately. I feel like he can’t do anything right at the moment but he’s not doing anything different than he has been the whole time we’ve been together - I’m just getting upset and feeling hurt a lot of the time when he says or does things that 2/3 months ago I would’ve laughed at. I feel like he’s more interested in his hobbies of motorbikes and cars and it seems like looking at other women than he is in doing anything with me. We both work full time so I understand that he needs his time (just as I need mine) but I get no time without it being an argument that almost always ends in tears from both of us. I love my partner so much but I’m just really struggling right now, it’s beginning to feel like I’m dating an onion because I’m crying so much but it’s my own silly mind causing the tears!

Have any other ladies been through this? How did you explain to your partner that you didn’t know what was going on with yourself to cause the mood swings and changes? What’d you do? Can anyone help give me their perspective or what I could do to help him understand that the problem really isn’t him right now, it’s me? Thanks so much!