I know that for me I definitely feel like, ok he/she hasn't txted me back yet, am I not worth a response? Then I think that maybe I P.O'd the person or something, then I get mad that they haven't replied. I totally have to try to back the eff away from that thinking because like others have said, I can't control their response or lack thereof. I don't have any tips though, because it usually doesn't work. I don't usually end up si/sh due to the lack of response, but more so if a response "triggers" something from my past....(if that made any sense?)
Hope that helped a bit? If not, I'm sorry! Hugs to you tho.