Possible breakup anxiety

I have been struggling with severe anxiety for about 4 years now. Most recently in the past 2 years I started dating someone who I feel an entirely new level of love and care I have not felt before. I am 27M she is 25F. We have talked about marriage and everything. We are without a doubt each others best friends (and yes that goes both ways I have 0 doubt). For a long time I focused my anxiety around her and being "right". I have always told her these things. Recently it has come to a point where we decided to take a break (I decided). Very quickly i realized my mistake,however she is very beat up on it and is taking space to clear her head. I am devastated. She has texted me every day (just a little to say good morning or whatever). My head is running crazy and idk what to do. She's my best friend. All day I convince myself she's screwing with me or doesn't love me and is forcing herself to stay in touch. I'm so lost

Tldr anxi3ty has taken control of my life. I am already in therapy and trying a second round of new meds. Please help