<human>: Can you give me a shortened version of the text?

So, my good guy friend and I are all buddy buddy with each other. We always pick on each other and things are pretty casual between us. The other day I walk outside (we go to college together) and see him sitting with a girl. I was going to obnoxiously say high but saw that they were having what seemed to be a moment and quietly backed away behind a wall so they couldn't see me (I wasn't about to interrupt something serious). I was waiting for another friend to meet me outside and thought I'd stick around there to say high to the friend in question when he finished talking. So, I saw them kiss (big woop) and he immediately got up to go back inside and saw that I saw. He called me a creep and then gave me the most pained/angry expression I've ever seen him give me. He's seemed  mad at me since then(we haven't talked). I feel bad, I didn't intend to spy on them or make him feel bad. Is this normal between friends, because I've never had a friend react this way. Should I apologize? I'm kinda dumb with these things and this seems silly. Would it make him feel more awkward if I talked/texted him about it?
<bot>: accidentally saw male friend and girl kissing and now he seems angry at me. Is this normal? Would it make him feel uncomfortable if I brought it up? Do I need to say sorry?