A co-worker is saying I ually hared him with no proof. Is he feeling guilty that we worked well?

He would wink & smile we laughed & told jokes, but never went out together. He even stated that he felt things went "deeper", but now he's keeping quiet. He's married & I think he's feeling guilty. I got terminated for this & don't know what I did. My schedule wasn't changed or I wasn't relocated. I feel set-up, confused & used. I'm not saying I'm innocent, but I feel this was a big misunderstanding. I'm taking responsibility for my actions He is staying hidden & not saying anything. I never saw a claim even though I requested one. He said this & I'm guilty. My proof is always "too old" or it doesn't matter. There's 2 sides to a story so things should matter. Is he afraid his wife will find out he flirts at work? Don't I have the right to face my accuser? I held my job for 17 years. Help!