My boyfriend/fiancé went to visit a woman at 2am

Yesterday my boyfriend/fiancé and I weren’t in a good place we’d been arguing the night before talked it out eventually but there still was some tension, then I noticed his phone kept ringing, from the day that I’ve met him he’s always answered everyone’s phone call he runs a business so he says “missing a call could be a missed opportunity” so he ALWAYS picks up this night he kept ignoring/hitting end call and when I asked him why he wasn’t picking up he said “because it’s not important”🤨 I took a mental note and continued watching tv then again his phone rings and this time he picks up and said “you have to stop calling me baby it’s late we can talk in the morning” (he calls everyone baby btw his sister/mom/me but I get the ick) and I CLEARLY hear a woman’s voice speaking I’m not sure what she said but after he hung he said he was “going to the store to get something to drink” AT TWO IN THEE MORNING! I Immediately knew he lied to me he walked out and didn’t come back for like 30mins I’m not exactly sure because I was on the phone with my girl-friend raging. So naturally he comes back empty handed because he’s a Liar and I ask him where his drink was and HE SAID HE DRANK IT!!! I almost lost my 💩 I gave him the silent treatment only because if I spoke I knew I was going to start another argument and I’m just exhausted he gets in bed still trying to talk to me then minutes of me not responding to him he comes clean and says he met up with an Ex-employee because she was having “financial problems” and he helped her file unemployment at his office I told him he should’ve checked her and told her he would speak to her in the morning at 9am which is when his business opens not 2am when you’re with your fiancé we had our own issues to hammer out but was so quick to solve another woman’s crises and he got annoyed a and said “is all you care about is that I was with a b***h🙄” IM SORRY AM EYE BEING DRAMATIC HERE?! Im really sick of this I keep seeing red flag after red flag and the other day I saw old messages between him and a girl who rejected him open as if he was reminiscing on their conversation. I’m really considering calling it quits I don’t believe his story at all.