When I was younger and first starting to wonder about it and was unsure of myself, I had two close friends tell me something similar. The first one, a guy, said, 'Uhm, why don't you just be who you are and stop pretending to be something else?' and the other one said, 'Just stop it. No matter how hard you try, you can never hide the truth, everyone will know.' Pretending to be someone else meaning pretending to be a guy, and the 'truth' was that I was a girl. Uhm, no. We're not 'pretending' we're guys, and the 'truth' is, we're NOT girls! Stupid!
I can't even begin to commiserate with you on how full of crap and misinformed statements like those are. I really feel for you, bro. Transitioning isn't pretending to be someone else- that guy who told you 'just love yourself the way you are' doesn't have any idea what he's frickin talking about! By transitioning, you ARE loving yourself for who you are, because a man is who you are! Staying in the closet and pretending to be happy when you aren't, THAT, is not loving yourself, THAT, is pretending to be someone else! He doesn't understand that not pursuing a path that will enable you to be open/free about yourself is just like punishing yourself. If you love yourself, then you respect your own wishes and needs, and do what you gotta do, to pursue personal happiness.
When people like that say things such as, 'one day she'll want a 'real' man', it's implying that a cock/balls are what make 'real' men. That's disgusting, and not only demeaning to people like ftms, but to cisgendered men as well, meaning the only thing a man is good for is his semen and dick. If someone wants to be with you just because you have a working dick/balls, that's a pretty godamn low standard. Obviously, if you have a loving chick who has been with you for years, she loves you because you're frickin AWESOME, not because of what's in your pants. So what, is that kid trying to say that if a wife had a loving husband who got his penis cut off he'd suddenly not be a 'real' man and she would have to leave him for someone with a penis? Preposterous!
Don't let this BS drag you down for too long!