Hello Doppeling: What you have written here all sounds very familiar to me. The one thing I want to say is, if you're around 17, you have plenty of time to undertake a transition if this turns out to be the direction you need / want to go. The only thing you lost was the opportunity to take testosterone blockers to delay the onset of puberty. But I've seen many trans individuals on YouTube who were older than you are & who transitioned into beautiful trans women.

What you mentioned about your gf wondering what it would be like to be male is significant though. It is true that pretty-much everyone has these sorts of thoughts from time-to-time. Even individuals who think they are transsexual sometimes, in the end, decide that they are not after all. And some persons who do turn out to be trans decide, in the end, not to transition for one reason or another. So the fact that you play the games you describe does not necessarily confirm that you are transsexual, although it may be suggestive.

There is no test that can confirm trans-ness. It is something you have come to a decision about yourself along with the help of an experienced gender therapist. From my perspective, it is important to find an experienced gender therapist. Therapists who are not experienced sometimes do more harm than good.

I'm glad you found your way to PC. There are many supportive people here. It's also a great place to learn more about being trans & about mental health struggles in general. Keep in mind that the more you post, & reply to others' posts, the more you'll get from the time you spend here. Best wishes!