I can tell you from personal experience that I was born female and growing up I was a major tomboy - always wanted short hair, dressed in boy's clothing, didn't like dollies or princess dress-up or things like that. I played Hot Wheels cars and my friends were guys, I could tell dirtier jokes than most of them and even had some friends who thought I was a guy because my name is suitable for either gender...
When I got older I became suicidally depressed when I got my period, to the point where I would cry and feel really bipolar from my other times happy self. It got to the point where I was put on Depo Provera (progesterone) because the shot makes you NOT get your period. I never wanted kids and didn't like babies, so reproductively I didn't fit the female mold - especially because I was very fixated on sex - something our society tries to pretend is something only boys really want and try to get during those years where girls are supposed to be 'good' and not want to be 'slutty'.
I even thought lesser of women than men - believed they were less capable, didn't have many female friends, preferred the company of men, etcetera. I was basically a misogynist. With all of that, how COULD I be female?
I always wished for a penis and had tried to pee standing up many times, actually with a good bit of success. At one point it came to others' attention that I may be transgender, and remembering and retelling these experiences it seemed like all the evidence was there! I took testosterone, had doctors giving me diagnoses and they for sure thought that I was transgender...
I had top surgery, bottom surgery, felt really into my male identity - I thought it was great to be a man! But you know what? Even as a 'man' I would look at myself and see something that needed changing. Sure I was happy after top surgery, but then a year or so later it was frustrating when I didn't have pecs... I looked at my face and wanted a larger nose and a big squared jaw like the men I admired... dysphoria does not go away. Either we learn to accept ourselves as we are (whether with or without transition) or we continue to focus on and obsess over every feature we don't like.
The grass is always greener on the other side... that's why plastic surgery is such a big business. It's easy to say I would be happy if... I just had someone who loved me... if I could only have children ... if I didn't work at a job I hate... if I had more money ... if I was a guy ... if I was a girl ... but you know what? At some point we have to realize that just like with buying that new electronic or car or house, life is infinitely more complicated than that and either we learn to be happy right here and right now or we keep spinning our wheels and chasing our tails, wasting time and money and suffering until the lesson finally kicks in.
Eventually I realized that I was NOT transgender - yes there were things I didn't like about being female. Yes I had suffered from dysphoria about certain aspects of my body. But those things never go away - if you focus on the bad things about being YOU, no matter your gender, then when the newness wears off, you settle into a normal daily routine, and go back to ruminating on negative things, you will be just as poor off because you'll still think about all the bad things in your life!
I am now in the process of detransitioning, which I began earlier this year. Of course there are still things I don't like about my body, but it's different things than before. Instead of loathing the fat on my thighs, it's the little bit on my stomach from T that I detest, instead of wishing for a 'happy trail' that I always thought was so cool, I am frustrated by the one that is present and the stubble or red bumps when I remove it... instead of wishing for big strong muscles on my physique I am removing body hair and waiting for the hair on my head to get longer.
I learned that happiness is in the mind. You cannot buy it with money nor can changing your circumstances change your outlook. It's something that happens inside, not outside. Realize that there are disabled people much happier than plenty of 'perfect bodied' people and even models! Realize that there are people scraping by with barely food or anything living in the ghetto who are happier than some rich and successful people! Realize that I know single people, infertile people, and people who've lost their partner or child who have a nicer outlook and better lives than some people I know who are wealthy and married with their whole family alive and well!
Nothing can 'make' you happy. When you think a negative thought, change it to a positive one. It's not easy. It seems like work. It's like exercise. But it's the only thing that will ever, ever make a real and lasting difference, otherwise you'll find yourself able to change job, house, partner, anything and still never feel the happiness and content you imagined would be yours once the last problem disappeared - because there is ALWAYS another problem. Life isn't about racing to solve them all, it's about enjoying yourself and your life despite them.