Should I let him go?

My boyfriend and I recently went through some turmoil. He's away right now and won't be able to be with me for about a year and he told me he didn't want me to waste my time waiting for him and that I deserved better but I told him I loved him and didn't want another guy. Well, all that's been settled, we decided to stick together but something happened yesterday that really upset me.

In a letter he wrote: "If one day you piss me off by doing something I think is wrong, I'm never going to talk to you again." I poured my heart and soul out to him in my last letter, telling how much I loved him and that I didn't want to lose him and he says that to me. I've never given him any reason to believe there's a reason not to trust me. I am a woman of morals and honesty and he knows it. He's Mexican and my Mexican friends tell me many Mexican men are like that with women, as far as trying to control them and call all the shots. I think his attitude is immature. He's 30 for goodness sake (I'm 29) and I feel like he's disrespected me. I told him I didn't like what he said in the letter I mailed today and that I felt he was disrespecting me.

I have a feeling he's going to be angry and may well cut me off. To me, if you really love someone you don't just walk away because they piss you off. Should I keep trying with him or cut my losses and find someone else? I honestly do love him but I've given this guy so much of myself and I feel his comment was 100% unnecessary and that I in no way deserved it. If he can so easily walk away from me if I pissed him off, what's to keep him staying with me forever? And I don't even know what things he was refering to as things I could do to make him mad. Any ideas, people? I know he feels depressed right now because of his situation and he has no way of knowing what I'm doing or who I'm with so I assume he was talking about me cheating on him. He also told me he wants to have a family with me but he has 3 kids with two other women and is not a part of those kids' lives so I have to worry, what are the chances he'd stick around for any kids we might ever have? I'm confused and worn out with all of this.