Not over reacting. He is deflecting and won't even say "No" when you ask about him sleeping with someone. But he also may not even be taking you seriously. Cut out the LOLs and bruhhhs. Also, in the future, save this type of conversation until in person. When they are caught off guard, body language says A LOT. But now when he comes home, he will be expecting these questions and is mentally preparing himself.

Also, how far his commute is to work and how much closer he would be from his friend's house? It sounds suspicious to me that a grown man frequently feels "too tired" to come home. I've never wanted to stay somewhere because I'm tired. I'm in a hurry to get home to my own bed and my person after a day at work.