"You can be anything you want if you just put your mind to it." So goes one of the most depressing phrases in common belief. If you happen to be 5 foot 7, you cannot be an NBA center, regardless of how much you put your mind to it. You can practice a bunch and become very good at basketball, but it's near impossible to be an NBA star (unless your name is Spud Webb), and there is no way you'd be a center.
We all have some kinds of physical limitations, but we are remarkably adaptable. We can learn many different skills. We can become good at almost anything we put our minds to, but we still have limitations to what level of excellence we can achieve. And we can't change our stature by willing it to be so.
Similarly, we can't just change our orientations by willing it. No matter how much one may wish not to have a gay orientation, it's like your height. It's not going to just change. However, you can increase your love for those around you. You can develop and get better at social skills. You can work on healthy relationships with people of both genders, and of all orientations. There is so much that we can take time to develop, we don't have time to fret over the things we can't change.
We can become so much -- we can become more like our Father in Heaven. That's a worthy goal. Don't lose sight of it by worrying over what we can't change.