I had that problem with one guy i liked for a while. i dont know if this will help you, but it helped me a lot. i just decided to think of him as a friend, nothing more. it doesn't always work, but for me it helped me talk to him more normally and we ended up becoming pretty much best friends. we were in a romantic relationship for a little while but now i realize we're better off friends. anyways, hope this helped if only a little..