I had a similar experience recently. I've been thinking love/a relationship would solve all my anxiety/loneliness/anti-social problems but any time I'm around the girl that likes me I get shaken up, freeze up, and words won't come out. I can only imagine it would get worse somehow if I did manage to go out with her.
I broke up with someone a few months back because I went through something like this. Couldn't even hold a proper conversation at times and felt like I was dragging them down.