Don’t beat yourself up, most newbies have a hard time DBing early on. That’s why the recon rate is so low. Tony Robbins keyed the phrase “Rejection breeds Obsession” and that’s what you are experiencing right now.
As for vets we can only give you the best advice based on 100s if not 1000s of situations we have seen. It’s up to you guys to take it or not. Most don’t and suffer immensely for it.
It’s not surprising she didn’t respond to your text. She doesn’t want to give you false hope. The best thing to do is to pick yourself and dust yourself off and start to DB.