Men of reddit, what's the hype about lifting weights?

Men of reddit, can I know why you're interested in woman knowing what you can lift or squat?

I'm (15f) so confused rn. I have a friend (who I think had a thing for me but I'm not interested at all) who goes to the gym, and then tells me how much he lifted and what's his pr. I don't know how to respond because I have no knowledge about this topic, and frantically, I don't really care.

Keep in mind that I had a guy confess his feelings a couple of months ago and I wasnt interested, and I won't be for any guy for the next two years or so. Anyway so I've never wanted to hurt anyone or upset them (I'm not arrogant or ungrateful, and I'm not even that attractive I think) so right when I met my friend and he was kinda dropping hints I told him I'm not interested. So I'm pretty sure he's not trying to flirt by saying the weights.