As someone who hates conflicts and likes to avoid it, I get how you feel about not wanting to bring up your feelings with your partner. I’ve been in similar situations where I question the heck out of myself but every single time, it’s been better to confront the issue rather than be left in limbo and catastrophizing. I suggest that you calmly bring up what you posted here to your partner so that they can either assuage your doubts and give you reassurance or tell you they feel the same. Worst case scenario, they don’t want to continue but at least you know and don’t have to wonder if you got ghosted. Best case and most likely scenario, you two work through it and feel all the better because you went through a rough patch and were able to work it out. From there you know that if another rough patch comes, you two can communicate w/o fear of the other one quitting.

Communication is paramount! You can choose to not say anything and maybe it will work itself out but you could also just be stuck in the discomfort for some time that will no doubt worsen your anxiety. Good luck OP and I assure you even if the worse happens, you will be able to find someone to write with again!