Transgender women who were attracted to women before transitioning are still attracted to women. In fact, 40% to 60% of transgender women are bisexual or lesbian, so you can chose to date with whoever you want.
Gender and sexuality are different from each other
Dating with trans girl doesn't mean you are a gay or bisexual, gender and sexuality are different from each other, and many people don't know the difference between them. Transgender women are women also, if you are attractive to transgender women, you are also attractive to women.