Your friends are trying to be nice. You probably reek.
If I reeked my parents would tell me, especially my dad who'll notice when I stink right away and will bug me about it if I do lol
I legit don't loving stink IRL, I would if I was like 1 shower a month, but 2 showers a week along with deoderant every morning and a squirt of cologne, and me not being that active keeps me smelling fine