Need advice. Bf thinks I cheated.

Bf of three years comes by last night and spends some time with me. He leaves. An hour later , we Skype for a while. I go to bed because I had to be a work at 5 am. Well around 9 am I message him saying I hope he has a good day. He then calls me yelling and accusing me if cheating saying that his friend saw A MAN DRIVING MY CAR AT THE GAS STATION and then proceeded to send me pictures and videos that his friend took of this strange man (never seen him in my life ). The friend says it looked exactly like my car with even the same dent in the door. Honest to God , it wasn't my car. Never seen the man. Obviously friend is confused . Anyway, I went to his house after work to talk to him. He would not answer the door. Proceeded to text me from inside of the house saying " you're acting guilty AF right now , I'm not ready to talk to you, I need time to think, back off of me".

Guys. Wtf. he is the one acting guilty right ? I'm not crazy. He won't even hear my side of things . Any advice ?