I know what you're feeling, just opposite, me being a transguy and feeling that way about cisguys. Even though I'm a virgin lol (and bisexual/pansexual)
But like... yeah, you see a cis person with a body you long for and for me at least, I can't help but wonder if I'm attracted to them or attracted to the thought of looking like them/having their body. I think at the point I'm at right now, I couldn't date a cisguy because I'd be too jealous of his body and feel bad about mine, even if he liked me how I am.
I think once I start hormones and/or get top surgery(which I will eventually) then I'll feel a lot more comfortable and open to dating and being with guys... It's just too stressful to even consider that right now.