Please give advice (unrequited love)?

So for about 1.5 years I’ve been friends with this guy. Eventually I began to like him but didn’t say anything to be sure. Eventually, I was sure and told him. I’m assuming feelings were not mutual because he did not tell me they were and we remained friends.
I’m pretty sure he is dating (single but dating).
I don't know I guess I say all that to say is some days I feel like shit, some days I feel great, some days I’m ok,

I feel like I ruined a good/smooth friendship by expressing my feelings (I had a feeling he wasn’t interested in the same way but still felt the need to tell him)

Has anyone experienced this?
Do y’all have any advice or suggestions?
Please give advice (unrequited love)?
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