Unlikeable

I always feel like im not likeable enough or good enough to be someones friend. Or even when I am socializing I always feel insecure and am constantly keeping myself in check when it comes to every little thing i say or do. I then become exhausted from worrying too much and just give up on making new friends and socializing. I dont really tell this to people because alot of people view me as "popular", but its only because Ive stayed friends with people who are actually well known and liked by everyone. I feel so invisible when Im next to my friends because everyone loves them and I'm just seen as closed off and unapproachable. It also doesnt help that I have social anxiety and rbf. Is anyone else in a similiar position?