Hi Everyone,
I need some help and hoping some of you can give me some advice. 
I'm a 24 year old male, still living at home with my parents but eager to move out, saving every penny I can. 
Ever since covid stuff started, home life became hard and it's just getting worse. Now my mental state is at the lowest its ever been. 
I have been with a girl for 2 years, but 3 months ago she ended it. It killed me. 
I thought I was slowly moving on but now I've found out she has a new boyfriend, so now my anxiety and whatever else has become uncontrollable. I don't sleep much, I spend most weekends just sat around with nobody to speak to, I'm so alone now. All I can think of is this girl, the girl who isn't interested in me at all anymore, and it's killing me. I just can't shake off these internal feelings and it's getting to a point where I feel like there's only so much more I can stand of feeling like this before I give up with everything. 

I'll add that we never really did anything sexually due to our mutual religion, so some may say I didn't really get that deep connection, but I did. I was thinking I was going to be marrying this girl soon, and she agreed, so to have now lost all that happiness, all that hope, it's devastating to me.
 
I lost most of my friends recently as they've all moved away, or got married and I'm just here, single, lonely, I guess overweight now too, and it's just too much. 
Losing my girlfriend has really pushed me over the edge. 

Does anyone have any advice for me? I just don't know what I can do, I'm helpless at this point.
I've never been to a doctor about mental health, I have always refused to want help with it, but the anxiety that is within me constantly just isn't doing me, my mental state or my physical body any good. I've put on 5 stone within the last 4 years due to bad things happening to me (losing friends, work stress, girl troubles etc) and I'm fed up of it all
I just want to be happy again, and I feel 100% trapped.

Any advice would be greatly received.

Thanks all