Blank thoughts

For someone who’s mind seems to go blank and thoughts seem to vanish when talking to girls (M,21), are there any tips for overcoming this? I basically just forget words most of the time. Legitimately , Picture Mr. Krabs talking to Ms. Puff for the first time, similar to that. I just want to be able to have fluent conversations with girls without my mind going blank and my heart beating a million miles a second