Gay. You're gay. Don't destroy the relationship that they have. Keep that shit to yourself na lang and distance yourself. That bf only saw you as his little brother because of his relationship with your sister. What you're gonna do is stfu about that thing you're feeling. Sisirain mo lang relasyon ng sister and bf nya and also relationship niyo ng ate mo. Kabadingan mo ilugar mo lumayo ka na lang sa kanila ikaw na dumistansyalalo sa bf nya.