I made my partner feel insecure, and now I feel awful

I teased my partner of something that I thought would come off as lighthearted, but it turns out that they’re insecure of it

I feel so awful.. I apologised, but I know they’re still upset, and I just feel like absolute trash, ashamed even. I don’t know what I can do, I’m scared that they’re gonna grow distant or just straight up leave me. I really didn’t mean to upset them, but I don’t know what to say anymore