I was very similar; it suddenly hit me at 32 that I wanted to live as a woman. I didn't hate my body, I wasn't depressed (yet), I wasn't suicidal or miserable. I thought I'd be happ*ier* as a woman, but I was content as a guy. And I probably would have figured it out sooner if someone had told me that this was possible - that it wasn't necessary to be desperate or suffering to "deserve" to transition.
I started off taking baby steps like ear piercing, and seeing how I felt. I figured I could stop at any point if something didn't make me happier, and it's also possible to customize your journey (for one thing, surgery is NOT required, and you're absolutely just as validly trans if you choose to be non-op). I didn't admit I was really trans until I'd gotten as far as scheduling GRS, mind you.
I kept waiting for someone to tell me I wasn't deserving of it because I wasn't desperate. But the thing is, being a woman did in fact make me much happier, and that's a good enough reason to transition.
Short answer : you can do what makes you feel better without committing to any sort of long-term path, and don't let anyone else tell you that there's only one way to be trans. You may turn around in a year and realize you want to spend the rest of your life as a woman; you may not, or you may fall anywhere in between. It's all OK, and you're entitled to change your life in ways that make you happier. Oh, and there definitely are trans lesbians! I'm bisexual myself, but lots of trans women here are lesbians.
