Oh my gosh i have also been through horrible relationship anxiety and i cant tell you what a relief I just felt finding this thread!
Right now I am goin through a really bad patch with it. My partner has had some bad health news and has been quite distant compared to usual and just not himself and I've had a bad time with my depression and anxiety(havent been able to go to work)
Well tonight ive had the worst panic attacks ever and its due to these relationship anxieties and similar worries to what you guys have had.
I have been through these before and always come through them but its been a while since i have had them and forgot how horrible they are and how easy it is to believe these intrusive thoughts.
I have to say i really do love my partner, he has been extremely supportive of me but I just have these horrible intusive thoughts thta cause me panic attacks and I cant stand them. Really gets me down. :(