Am I overthinking

My bd/bf was gone for a work trip for a month. He just got sent home the other day. When he would talk to me needing help on splitting costs of the flight home, he was all nice and thanking me. Now that he doesn’t need money it seems like after every flight he got off of, he hated that I called him checking on him. In his voice he sounded so annoyed and was raising his voice at one point.

He was waiting for the next flight for 7 hrs the other day at the air port and was completely ignoring me for hours at a time. I feel he was on bs but idk. I’ve only flown once so I wouldn’t know, is it normal for ppl to be this irritated at the airports ? I want to be understanding if so.