Please help?!

Morgan • I'm 17 years old, single and a dancer

So I'm single and I always have been, I find that I can have a "thing" with a guy but as soon as it comes to getting really close or in a relationship I can't do it and have to stop the "relationship" due to my anxiety playing up whenever I get close.

I'm 17 and I'd really like a relationship but I just can't have one because it gives me anxiety.

How can I change this and be more comfortable?

Please help!