I think you're being a little too harsh on yourself. The average 23 year old is also anti social because they are broke. 20s are hard times. You're learning about everything in life in addition you also stutter. Your dream us go travel. That's great. Save up and go do it. Many people travel alone. There is a whole subreddit. Also when you travel you can always go to hostels where you will find people like yourself :). You got this friend