Having a bit of a mental breakdown

I think the guy lm working with is trying to set me up. Things were kind of shady today. He threw done his key chain to me and the lanyard broke because they hit the ground. He seemed really upset but said nothing. It might have had sentimental value to him. It seemed like he was gone for long amounts of time today. He was careful with his words at times. I tried to finally open up today. I mentioned my girlfriend and I go camping at a lake all the time. He said he lived by some cherry town place or something that's on the way there. He mentioned a building that he said his friend bought and I said I might have seen it driving by. He looked shocked like it meant something to him. Later, for no real reason he said SORRY TO PISS YOU OFF in a loud tone as if to let someone else over hear. I calmly explained that it's hard to piss me. He says OK.. as if he's collecting information. I say it would take you like a month to piss me off a work. He says OK... again in the same tone. We don't talk much after. He looks like he's thinking and examining me. We usually clear the tools out of unit 77 because we don't have the key. But this time he assures me it's OK to leave my tools here this time, but I might want to bring my drill with me. His tools are not there. I get this shady vibe from him as we are in the elevator and leave.

Does this seem rational?

He was being overly nice in the beggining but now that I'm trying to drop my gaurd he's being shady or am i just perceiving it that way?

Two guys also approached my truck today. One guy asked for a smoke, one guy was at the other door looking in. Were they checking my shit out? He mentioned to the other guy ad they walk away that i was about to reach for sometging under my seat. I was. But i didnt. Are they connected to the guy i work with? Am i about to get framed? Or jumped or jacked? Im on high alert all the time i dont know what is real anymore.