Are My Expectations Too High? Selfish Bf

I've been dating my bf for a bit over a year (oct anny). I've felt for some time that maybe we're just innately incompatible. I feel that I love him (trust, am happy with, feel safe with..) but sometimes I think it has to be more than love keeping a couple together. What renews my belief that we're incompatible is what happened yesterday:

We both committed ourselves to a 10 mile march (affiliated with my work place) to begin early in the morning. We had some fruits for breakfast, I gave him most of mine because I had just brushed my teeth (minty taste) and the combined flavor wasn't that appealing. We take off for the march. Half way in he starts complaining, and mentions that he would like to go home. I say fine, he can do whatever he wants. He stays around because he can't find a bus he knows the route of. Meanwhile we're both getting hungrier and hungrier (I had been given 2 oranges, which I split with him)... We reach the point where there's half an hour to go. Excitement. Then he spots a taqueria across the street, decides to get himself some food (he brought his debit card, I only had our bus fare). He buys and eats his plate, tells me he's found his bus, and says he'll see me at home (we live together). I continue the march til the end. Eventually I borrow money from a co-worker to buy dinner, go home, and fall asleep without a word to him.

This isn't the first time he's done these sorts of selfish, self-centered things, where he doesn't seem to consider me at all.. I'm not sure whether this is acceptable absent-mindedness and I'm blowing it over or whether it's a legitimate complaint.

**The reason I say "innately incompatible" is because maybe this is acceptable behavior for him but obviously hurtful for me and so would just represent different worldviews.