I knew something was up

We just went long distance relationship, he had to move for work. He has acted off, never talks sexual much to me even though he's a very sexual person. Our talks and text are very awkward now and it's not because I haven't been trying. Like he mentioned he had a long day yesterday so this I asked what happened, he read it and ignored me still hasn't answered. Today going through my phone I noticed he is at an apartment mid day when he's supposed to be at work. It's not his apartment either. I text him "hey what's up" to see what he would say. If I got a "just working" I was gonna nail his ass for lying. No answer so I decided to call. Nothing. This dude is most likely fucking some other woman and I'm literally fuming. When he texts me back it's over, I'm bringing it out that I know what he's doing, then I'm blocking his number and moving on. Just wished I never gave him a chance to hurt me like this.

Update: He messaged me back and told me he was at work. When I said "why does your location show you're at an apartment that's not yours?" he changed it up saying "oh well I'm at a co-workers apartment". I said "I find that hard to believe". He said "That's very fair not to believe. I'll talk to you later."