I’m completely introverted outside of my friend circle and I’m too intimidated to approach girls that I find attractive. Am I always going to be single?

If your friends appreciate you, they will understand where you come from and if they are good friends, they will still be there for you. Maybe take it one person at a time instead of hanging out with them in groups. Approaching girls does NOT mean you will be single, love will find you but so long as you are looking, it will be harder. Let the right person come to you, someone who appreciates you and cherishes you regardless of how you may be. The best kind of love is the love you have with your best friend that you learn to develop.

No, you will not always be single. It's ok to be introverted and everyone has a type, you don't NEED to be extroverted to find someone. You will someone who admires your tastes and needs just like someone whos extroverted will need the same thing, there are over 7 billion people in the world, that means there must be one out there for you bud. Keep your head high and keep striving, maybe you can try to move outside your comfort zone a bit if iits bothering you? like maybe try approaching a girl and saying hi, then maybe talk about interests and such and increase the convo every so on.