I'm sorry to hear you're feeling so down, do know that how you're feeling is completely valid and that it's perfectly okay to vent your emotions like this, it's much better than leaving it all bottled up. There's nothing wrong with missing your relationship, it happens to us all, just know that regardless of how down things may feel right now things can and will get better. I'm sure with time you'll find the right person for yourself someday, so try to keep positive when you can <3

If you're that negative, that could be the outcome. If you can't love yourself, no one else can.

I can relate. My girlfriend lives far away out of range of MBTA public transit with her immediate family and my apartment is one-person occupancy so she can't move in with me. Often lonely in my apartment. We're only together one day a week.

Been single now around 2 years and I felt like this at the start but honestly I don't think I want to date anymore and have just decided to work on myself. The best advice I can give you is turn those feelings of negativity against themselves and try and better yourself. If you feel fat remember that if you go to over eat or use that as motivation to go to the gym. If you feel stupid try to learn something new or accept that youre not as stupid as you might think you are. We all make mistakes. It shouldn't be written off as stupidity. If you feel ugly you can always attempt to fix what you see as your imperfections though everyone always sees themselves as uglier than they really are so try and see the pros instead of the cons. If there's something you don't like about yourself find something you do like about yourself.
I know that might all just be rambling but I hope it helps or you feel better soon.

Having grown up in a large family, I tend to treasure my solitude. There's no shame in being alone. Some of us are hermits through no fault of our own.

Aww no im sorry for this bad news dear I hope you can feel a, little more good of this :'c