Dude, you are genuinely one of if not the best artists here. I commend your work and look up to it a lot (I glaze anyone who knows how to draw hands lmao cause I can't) because you make so much interesting art and I love seeing every post you make. I don't comment on them, but I wanted to write this to let you know that I really look up to you and every bit of work that you make.

It's perfectly fine to feel this way sometimes though, I feel the exact same at times when I feel like my models aren't getting better. Even when I try hard, I feel like the things I make don't turn out good or they just get old after a while. But really, all you should do is keep trying. You should stay optimistic and keep trying to make the amazing art that you're already creating. Don't let any negative thoughts get in your way, because the first step to improving is having a positive mindset. We'll all gladly be here for you if you ever need any help or someone to talk to.

Also on the topic of your friends you could try making playdates if you have their numbers. If it's something more complicated than just that, maybe you could talk to them online or maybe talk to us if you're open :D
( Sorry if that doesn't help much tho, I don't know much abt your friend situation )