i need to change my personality because of people?

[Johann]

This is The Most Honest answer you shall receive. It may not all be what you want to hear; but it shall be factual.

Evolution has a system of genetics. Survival of the fittest dictates that certain genes shall pass on and certain genes shall not. If you are strong but timid, I would recommend overcoming that weakness as it shall leave you at a disadvantage in life.

If you are homo-sexual: this means that your instincts are not to breed with the opposite sex; which is probably evolution's way of telling you that your genetics do not need to be passed on. You are being weeded out of the gene pool. Not that that's a bad thing. Enjoy life. Fear nothing. Seize the day.
I hope this helped. Sincerely, Johann.