How do you know if a guy is holding back tears?

I won't give too much detail. But my boyfriend and I were on the verge of breaking up. We were having a very calm talk. However we couldn't see each other in real life, but we were on video call. He has only ever once cried with me, and hated every second of it. He's the type to "never cry", according to him. Anyhow, we were talking and discussing whether we would move forward. He obviously seemed hurt and defeated. He was telling me how he has strong feelings for me, and right before I thought he was going to cry, he stopped what he was saying and said, "If you do want to move on though, I understand." It is hard to explain, but he seemed as though he was holding himself back? Like physically. Does it sound like he was about to cry?

I don't want to make it into a big deal and make him feel uncomfortable by it, but I had strong doubts in how he viewed me. So if he was just about to cry over a breakup, then to me it seems like a big deal (because again, he hates crying more than anything).

How do you know if a guy is holding back tears?
Post Opinion