I need to vent..

Yesterday was my 3 year anniversary with my boy.. he had cheated back in December.. right around christmas.. I was 5 weeks pregnant and I miscarried when he told me I had a major panick attack and i lost the baby...

I forgave him and took him back and I fell in love with him all over again.. last night after our date.. I posted a picture of us on facebook.. you know.. showing off my man.. anyways.. a girl messaged me..( we use to be friends but grew apart.. ) she sent me a screenshot of him and her (the girl he had cheated with) and she told everyone he was her boyfriend.. even his sister in law commented knowing he was still with me.. I brought it up to him once he got home.. I tried to be as calm and easy going about it.. he told me he had told everybody he had moved on and was over me.. while he was telling me he loved me and wanted to have a baby with me.. we had been trying... I don't know what to do.. and I just want to kms.. I love him so much.. but if he did this.. was he even into me...