I would say this sounds more like classic Depression vs. BPD, but I'm not a doctor. You only get one body. Appreciate and care for this one. No one is ugly and if you really are convinced that you are - then you need to do some lifestyle changes to feel better about yourself such as clean & healthy eating, yoga or light exercise, dancing, or just lighting candles around your bathroom and taking a nice hot bath - these things make every woman including myself feel much sexier and better about themselves. Staying in bed all day is probably contributing to you thinking you're ugly because I'm guessing you're not doing your hair or experimenting with make up or taking extra good care of your skin, etc. So there are steps you can take to make yourself feel better about your appearance, I look 100% better after I get out of bed and get dressed up for the day and I feel better about myself - its not vain, its just true.
Even though you can't think of anything you'd like to do right now, you know there is something you're just not thinking of. You gotta find it, do brainstorming, seriously. Write a list of things that are even semi-related to the things you like to do, write list after list after list and eventually something will pop out at you that you never thought about before and you will eventually find your passion.
Write a book about separation anxiety, research how to create a website about depression, paint to get your feelings out, take a stroll outside, meditate in the sun in your backyard, do arts and crafts (there's an infinite number of arts and crafts you could start doing and even begin selling), attend farmers markets if your town has them, get really interested in eating healthy and vitamins and supplements and nutrition. These are all ideas that can make anyone feel better. Life never stays the same, it does change, it won't always be like this but you need to do some little steps to steer your life in the direction you want because this life is a dream and you're the one steering the ship, no one else is.
Do not ever put anyone else ahead of your own happiness and your own needs - this is what you're doing by worrying about everyone else but yourself. They're fine, you're not. So put them to the side and focus on making you happy.
You aren't in a relationship with anyone if you aren't in a relationship with yourself first.