<human>: Can you condense the text into a few key points?

Before my boyfriend left to work yesterday I asked him to text me his evening plans for when he got off at nine. We live together. I knew he was thinking about seeing a show if he could get in for free but I said if the free thing doesn't work out I'd be down to get a drink or something. Nine rolls around and a friend of ours asks me if him and I want to hang out. I text boyfriend and he says "I'm in a weird mood, stressed about money, I took half a Xanax so it depends." I ask after that for an update but he doesn't text me again till 1 am. I had texted wtf and at 1 am he replied that he was at a friend's and by telling me "it depends, took half a xanax" that that was telling me he was chilling for a while. I didn't care if he wanted to stay out late but I just wanted a heads up, also because he left his key.

The doorbell rings at midnight and I open it up assuming it's him but it's the neighbor. So then I'm extra annoyed that I could have been killed by a homeless murderer (I wouldn't open the door at midnight unless I thought it was my boyfriend). He shows up at 3:30 am and our roommate happens to be up and lets him in. When he comes back he doesn't say hi and keeps turning on the bedroom light apparently because he lost his beer. I told him to sleep on the couch and have the beer keep him warm.

My question is this: now it's the next day, and he is just ignoring me being upset. How should I approach a conversation about it? What is the right way to deal with conflict? Growing up my dad did the same thing to my mom he does, just ignoring her and pretended nothing is wrong. So I'm not sure how a healthy relationship is supposed to deal with conflict.
<bot>: Boyfriend disappeared till 3:30, I'm annoyed. How do you approach dealing with being upset about something in a relationship if the other person acts like nothing is wrong?