It’s a very common conclusion among men. Before I finally met my gf at 23, I thought the same thing. Getting friend zoned left and right and pushed away while everyone else is whoring all day everyday for as far as you can remember makes you feel like an expired rotting piece of shit. Sentences like “You’re too good, you deserve better”, “Someone must like you, you’re great!” or even sentences from older women like “Oh, girls must like you.” just start feeling like thinly veiled insults, like everyone is making fun of you, even if they aren’t.