You didn't completely lose her because you never had her! You guys weren't dating, you haven't even went out on a date, you guys were chatting. For two weeks. She expressed interest, you did to, then for whatever reason, it didn't work out. You can't lose someone you never had. and YOU didn't lsoe her. It just ended
I know from personal experience that anything that goes from 0-60in 3 sec flat, pretty much goes in the opposite direction just as fast.
It's a learning experience for sure. Slow and steady, get to know someone, don't only follow their lead, look for red flags.