Social skills: none

So i have like most of two friends remaining irl, and we dont talk much except when we are in college, it could be my fault too bc i dont prefer calling or texting them often but that doesnt make any sense bc i socialize on online platforms. Maybe i dont feel like talking to them, thats bad ig. The online friends i have atm, i feel like not talking to them either, bc i think we gonna stop talking eventually anyway, it never lasts. I am socially anxious and i prefer being alone most of the time when im home. And when im out, i stay quiet, i could have some things to say but i think “well it doesnt matter what i have to say, im the quiet one”, which is how everyone sees me. The only person in the world who doesnt believe i could ever be the quiet one is my little sister, how would i explain lol. Idk what to do at this point, the number of people I’d consider talking to are reducing day by day and my social anxiety isnt going anywhere, neither is my need to be alone. Maybe this is self sabotage and i know everyone needs friends, i just dont know how to start being comfortable making friends irl, when most times i dont want to but having no friends will send me over the edge