With all due respect, this is a response that is not only incorrect and misinformed but also dangerous.

There is such a thing and your gender not being the same as the one assigned to someone at birth based in primary sexual characteristics.

Gender and biological sex aren't one and the same. Gender perception is based on a lot more than what hormones dominate in your body and what your gonads turn into(in utero the testies and ovaries start from exactly the same thing and it is a spike in either testosterone or estrogen that determines if the embryo ends up with testies or ovaries). Gender is likely a combination of subtle biological influences and especially artificial gender norms and expectations. It's something extremely personal, nuanced and at the core of who we are.

If gender norms didn't exist, if people weren't so conditioned into 2 ways of being based on genitals, there would be a lot more fluidity of gender because gender itself is a social construct in most everything. What do you call male ways? Testosterone itself doesn't justify the gap in things like violent behavior, emotional repression, etc. No, society pushes that to extremes, which is easily proven by the great differences between people of the same biological sex. Other stuff, such as preferences, hobbies, etc are all social constructs. You're not biologically programmed to like certain things, those things are all artificial, a product of society not something that occurs in nature so of course you can't be conditioned biologically to like the color pink over the color blue just cause you have ovaries. I believe you get the point.

If someone says they are pretty sure they're trans, then they are trans, they are the gender they feel they are.

Hey!

I want to say that if you think and feel you are a man then you are a man and that is absolutely wonderful and alright.

Personally I consider myself genderqueer or nonbinary and more on the male/masculine side of things just that I feel in between not just one or the other. I'm also a biologically female.

As for your sexuality, I am sure you know but I will affirm that it has nothing to do with your gender, it's entirely separate so you just happen to like men, regardless of your gender. Gay or straight or bi...those are just labels and there are plenty of trans men who are attracted to men. Trans men are ,after all, men, just as trans women are women. Does it make things a bit more tricky and difficult? Sure, it does, but that's all because of how our society tends to be, nothing else.

In terms of my own sexuality, I am bi/pan but I've always seemed to lean a bit more towards men. As a quite masculine looking person who is gender queer and with no intention to do anything to my body and thus just go with saying I'm a nonbinary woman, liking men resulted in nothing but feeling unwanted, abnormal, rejected, unlovable, etc because men are socialized to look for certain characteristics in women(or men if they are gay) and I'm not enough of either. It made me feel bad a lot that I am not solely into women so I could at least slide as a butch lesbian or something, which is unfair anyway cause you can totally be a masculine woman, not even gender queer, and be straight.

Point is I know about this sort of thing and I understand it's hard but there's nothing wrong with you and you just have to live your truth.

I do suggest you try to get a good therapist in the future, who knows about gender identity and can help you really put everything in order and analyze exactly how and how much you may want to transition, to express your true gender and live your sexuality. In the meantime maybe you could try finding some bisexual/pan men in your area if finding a partner is something you really need now too and also find some trans men and women to talk to and find support in.