Feeling Isolated and Hopeless

so I haven't used this app in a while because I was doing better, but everything has recently come crashing down for me mentally again. I feel isolated, like I don't really belong anywhere or with anyone, even people I've known for years now. I feel like I'm either not good enough for them or that I can't relate or get close to them anymore, and I don't know why. im feeling a lot of hopelessness and have lost all motivation. I've struggled with anxiety in the past, but this feels more like a bad depressive episode, and I don't know how to handle it. if I try to talk to anyone I know about it I feel like a burden or a failure in some way. I just need someone to talk to, but I'm struggling so much with feeling out of place right now. I don't know who.