i keep falling in love with straight guys

hi everyone, i'm 21 bisexual, and the problem is this: i don't like gay guys. i had just 2big loves (for men) in my life, and both where whit straight friends so i never experienced real gay love. (one of the two infatuations is appening right now and I've been sad for the part weeks, and i mean really sad) the problem is that i can't find attractive or feel emotional attachment to gays. i don't know why, i have a ton of gay friends also hot guys but none of them can catch my attention in a romantic way. even the more masculine isn't my tipe. i don't even like the classic jock or straight hairy big guy with muscles. i like cute, polite, shy, young guys but they "have to be" straight. if i know someone i find interesting is gay my level of attraction falls down. i don't know why, i'm sick of having my heart broken (you know how it feels to love a straight guy) and I'm afraid that I will never experience true love.