Is this bad?

My bf and I have been having some issue lately. My trust in him has just fallen. We are seeing a therapist the first of the year to try and work on things. Idk where start. But somebody sent me fake message of him on fb, messaging other girls. Because the guy and him had sum beef over me. Guy wouldn’t drop after 6 months. I believed it Was fake because 1. He doesn’t use fb a lot 2. His fb pic he in a white shirt and the one they sent me he in black one. However, one day I had horrible headache he keeps the condoms with the medicine. I noticed 2 condoms was missing.. I asked him and he said he gave them to his friend. I believed him, but lately he been acting a little weird. Idk If he scared of because of losing me or what. I’m not trying assume he is and I have no proof. I will admit sum of my fault but just all events happens all at once. So difficult not think that, why we agreed to get help after the holidays to work on things. We never use condoms now because I’m on BC, would be bad to start using them.. like how should I approach him about it.. help? I just don’t want get anything or end up something happen when we are in this spot of relationship. And he is, like I said I have no proof. Advice please no hate. I can try my best answer y’all question as well.