You are not ugly and unlikeable to other people I promise, but when we don’t like or love ourselves, we find it very hard to accept that other people will, if that makes sense. We wrongly assume they see us in the way we see ourselves, and they don’t.
I’m going out on a limb to suggest your partner is abusive in some way and has totally undermined your confidence, self esteem and self respect. Probably slowly and over a period of time. If that is the case I can guarantee you will be happier alone - and will be able to make friends when out of their control.
I speak from experience and was like you at one time. I’m now in a very different place, happy with myself, my life and the handful of friends I have made.
A large part of what helped me most was going to church (for the first time in my life), doing an Alpha course and becoming a Christian, who knows the love of God. I apologise if this is overstepping and it would not be something that would ever interest you. However, if you’ve ever had any questions around “what’s it all about/what’s the point”, it may be exactly right for you and bring a lot of love and joy into your life.
I know religion and faith can be a divisive subject, and for this reason it’s not something I’d usually mention on Mumsnet, but something about OPs words reminded me so much of my past feelings and a colleague invited me along to her church and it changed my life. I am very aware this is a difficult subject and don’t want to derail the thread.