Respect yourself enough to walk away from one sided friendships with women who you want to fuck, or being in a sexual relationship with a woman of low quality (ugly, old, lots of attitude, gold-digging tendencies, needy, non-optimal logistics etc).
"That said, true self-depreciation is pervasive. Contemporary men have become so steeped in deprecation and male ridicule by popular media that it seems a normative way of attracting women." - Rational Male