There's nothing wrong with you, just a hurdle that you're up against right now. I've been through it myself ._. and it sucks and feels like the worse thing ever, and like it's something that will never be cured, but the only thing I've found to have helped heal it over time was self loving, by daily saying positive affirmations to myself in the mirror, thinking positively instead of negatively(this is hard to get used to lol), doing more things that I loved and felt happy doing(one of them is watching a couple of my favourite youtubers, they make me laugh and feel better about people and life in general), listening to online hypnosis(Which really does work!
), and slowly building up social life, like it could be by simply saying 'hi, how are you?" to someone online, or building up conversation little by little with a family member, etc. The best thing to do while doing this, is to try your best not to worry whether you are good at conversations or not, or whether you're good enough or not, as long as you're building up the blocks, and doing your best to stay positive. It's slow, but you will get there
I'm still in the process of building up conversation, talking to strangers, thinking more positively in everything... So lets do it together! XD