"I am a relatively clean person."

Followed immediately by evidence that he is clearly not a relatively clean person given the fact that he is happy to share underwear and wasn't even able to see that gf had opened the new pack, then put the dirty underwear back in the packet and with freaking discharge on. (Trust me, I'm a girl, that shit smells and is obvious if it had as much as OP says it had.)

Gf is undoubtedly the worst of the two but OP is not as squeaky clean as he likes to think.