Does he care about me?

We aren’t dating. We’ve just been talking for a while. He was on boys trip (I didn’t first know about it). It took him 12h-22hours ti reply to my texts. They were quite short too unlike his previous message.

I got annoyed and also took long time to repy. I left him on read for 2 days and then replied to him with quite short text.

He then send me 15 line long text explaining that he was on trip where he avoided using he’s phone also he wasn’t as focused on his replies as before because of the trip. He said also said that I’ve probably must noticed his different responses (which I did)

he didn’t outright said sorry but he did explain his behavior (which I didn’t force him to do )

does him explaining his behavior show that he’s getting attached to me? Im not his girlfriend or anything….
Does he care about me?
Post Opinion