Want some support

Hi I'm new to this so I don't no if I'm doing it right. I'm being tested for autism and anxiety but I do suffer from depression. I'm 30 years old. Not getting though things as I use to. Iv just split up from my partner of 8 years but there starting to move on and she's looking after her sisters kids which Iv know and helped with since birth. Iv heard that she's met someone but I can't seem to move on, feel like I want to give up on them but that's what I don't want to do. Can't help what's going on in my head, losing sleep. Can someone talk to me. X