Same thing! I used to dream about having people relying on me, but now I dream to not be responsible for anyone's life except my own. I guess I'm just not ready for this kind of responsibility, not ready to give something away until I have enough myself.
I get you, used to be this way. Eventually I found a girlfriend who loved me more than anyone else, basically praising me for being who I am. We broke up in the end because multiple reasons, but the main one was because I couldn't keep up with her needs and ultimately this relationship drained me more than fulfilling my needs.
There are two ways you can go about this:
1. Kick that door down. Go socialize until it burns you out, force yourself despite everything - no matter if you're anxious, depressed, tired, etc. Eventually you'll become a part of something and probably find someone. Chances are you'll come to the same realization, but if not then congratulations - you've been working hard and succeeded.
That was the way I took.
2. Focus on yourself. Become the person you depend and rely on. Learn to love yourself, learn to respect yourself, look for the good in yourself even if it seems there's nothing good. You're the only person you'll stay with until the end, so it's only natural that you come to terms with yourself. It's tricky to understand, but once you start paying attention to yourself as you would to your favorite person you'll start to grasp it.
I wish you the best, hope you'll find peace.