I (23F) still have feeling for my ex (23M) now that we’re friends again, how do I move on?

So our relationship was kind of complicated, it moved a bit too quickly for me when we first started out and we both had a few issues especially around communication. I’d like to think we’ve both matured a bit since then since we can both talk about the issues now, even joke about some of them. After we broke up (mutual) we went no contact for a few months before we started talking again and once we started talking again we became really good friends again.

The issue is, I’ve been reminded of all the reasons why I fell in love with him in the first place and I hate it because it’s not healthy. I don’t even want to attempt another relationship with someone else and the thought of him with someone else both upsets me and makes me so depressed. I’ve tried distracting myself by getting dating apps thinking maybe that would help but it doesn’t. Plus I don’t want to hurt others by dating them while I still have these feelings.

How do I lose these feelings, I’m too scared to tell him this because I’m afraid it will ruin our friendship or if I do tell him and we start dating again, I’m afraid that I’ll mess up again and ruin everything. He makes me the happiest anyone has ever made me feel, makes me laugh even when I’m feeling down, is there when I need to talk and is always up to try new things and go on adventures with me, even now. Every time I see him I really want to kiss him and tell him how I feel, but I don’t know if I can have a proper relationship. We were talking about it the other day in a hypothetical situation and he said it would be weird to be together physically/romantically but a few months earlier he did ask if I wanted to try a relationship again after a misunderstanding and I declined for the reasons above.

For the most part I’m fine remaining friends, hanging out with him has been the highlight of my life recently and when I do see him I don’t feel anything awkward about it, but I can’t shake how I feel. Even when he was with his last partner I felt a lot of jealousy around it. Any advise would be extremely appreciated as I have to move past this for everyone’s sake.

TLDR: I redeveloped feelings for my ex after we became friends again post mutual breakup but I don’t want to ruin our friendship because I don’t want to lose him forever, how do I lose these feelings?