You mentioned, in your original post, that you'd "read stuff online in forums that if you have this sort of fetish for gender swap (usually magic stories) of males changing into females then you are transgender." Personally I think that's an oversimplification. Yes perhaps some people who are trans like to watch these gender swap stories. But I simply can't believe that, just because a person happens to like watching gender swap stories, that makes them transgender. To say something like that, to my mind, makes light of a very complicated & difficult experience.

You also wrote, in your original post: "I remember when i was younger... I would wish i was a girl a couple times or picture i was a woman i found attractive." I don't know how old you were when this occurred. But I don't think it's unusual for people particularly in their teenage years to wonder what it might be like to be the opposite gender. If you had found yourself repeatedly having these kinds of thoughts, then... well... yes... maybe. But not just a couple of times. Plus if you never cross-dressed, played with make-up, & that sort of thing, I don't see that having thoughts a couple of times about what it would be like to be female, or to be a particular woman you found attractive, makes you transgender.

In your reply, you wrote: "Also, i’m confused when i look at a girl if i want to be them or have sex with them." Okay, now, this is something I can relate to. One of the most confusing aspects of my gender dysphoria experience has been that I've always been decidedly heterosexual based on my biological gender (male.) My gender dysphoria would have made a lot more sense to me if I had been gay. However, because I was both gender dysphoric and heterosexual I also always struggled with, when I looked at a girl, if I wanted to be them or have sex with them. So that can be, at least based on my own experience, a real transgender concern.

You wrote you've always felt comfortable with your body, you have a girlfriend and you're sexually active. It is certainly possible to have a girlfriend (or even be married with children) & be sexually active & still be transgender. But if you're comfortable with your body then, again, I don't see this adding up to you being transgender. However, being transgender certainly can be confusing. I know that for a fact. So if this is something that is going to continue to eat at you, the best course of action may be to find a mental health therapist you can work through this with preferably one who is at least familiar with gender identity issues. It may well be that the real concern here is not so much whether you are or aren't transgender, but rather the anxiety that all of this is producing as your thoughts about it continue to rattle around in your mind. Talking it all through with a skilled therapist may be the best way to put it to rest one way or the other.

There is one other thing I want to just touch on briefly. In years past, it used to be that gender identity was thought of as being a binary. A person was either male or they were female. Today we think of gender identity as being more of a continuum with male & female being at the opposite ends of the spectrum. And the reality is that few of us are actually 100% one way or the other. Most of us fall somewhere in between. So, from that perspective, the question may not be do you "want" to be female. The question may be more is the percentage of you that is male high enough, & the percentage of you that has feminine attributes (for lack of a better term) small enough that you're comfortable remaining in your male social role. And, based on what you've written here, I would suspect the answer to that would be it is.

P.S. Should you want to "talk" about this further, I'm always available via personal message.