Online dating!!

So I was in a pretty serious relationship for six months, we broke it off January 20th. Is it too soon for me to start dating casually again? I’m trying really hard to get over him. We are just friends now and we still talk, it ended pretty mutually because he said he wasn’t ready for a relationship anymore. I’ve tried to download some dating apps and just talk to some people, get my confidence back and try and flirt again. But every-time I get matched with someone or get a message I freak out. I’m not sure why, I get scared that I’ll run into my ex on a dating site and he will look down on me for dating or something or stop being my friend.

I’ve been told that getting out there again even just talking to people is a good idea to get over someone, but if I can’t get over him enough to even make a profile what should I do?? I feel so silly for freaking out and panicking whenever I get a message from a man!