So heated right now!!! Vent (sorry)

My S/O is a totally "great guy" or so I thought. I recently went through a miscarriage and I'm still trying to find the motivation to deal with life on top of my manic depression. Everything's been putting a lot on our relationship inside our home and out. Yet he has the fucking aduasity to go and join a dating site the same week! He goes and tells me I seem really distant and he's acting all scetchy when I look at him and he's on his phone. Like I love him but I'm so pissed. All my family is on the east coast and we're living on the west coast. I'm so angry and I'm just so done. Don't tell me how much I mean to you and how I'm your everything and go an do this shot