I think I'm in love with a trans woman

She's kind, intelligent, hilarious, and just overall an amazing person. Heck, we even like the same kinds of music. I'm concerned about the power dynamic; I'm her landlord and she rents a room from me. Even worse, it will be rather awkward if I'm rejected.
We get along fairly well, and I've helped her out a few times. I drove a good distance after she had a small car accident, and helped her locate a decent inexpensive mechanic for repairs. Just so no one thinks she's taking advantage of me, she's never asked for money, nor even for an extension on her rent. She also insisted on paying for the repairs herself, even though I offered to help. I've generally considered myself to be strongly heterosexual, but there is something about her I find enchanting. I've even found her attractive with her occasional five o'clock shadow. I long to hold her, and I've even had fantasies of sucking her dick (not a sentence I ever expected to say). Just to be clear, this person is actually VERY feminine despite some masculine traits.
I want to just close off and make myself unavailable to try to lessen my attraction, but that seems cruel somehow. She doesn't have any friends she can count on. But I also do not like this longing, either.
I'm awkward and most likely won't do anything about this, so I'm just wondering about your thoughts. Thank you for your time.