What can I say to people that tell me that my sexuality can be "cured" or fixed?

Tell them that my sexuality isn't something that can be broken and isn't a disease. It's fluid and can change, so they should respect you boundaries. Besides, it has nothing to do with them

Usually you can't really talk to these people even if it's very frustrating to hear things like that. Try to stay calm and polite and just say that this isn't how it works, that it isn't an illness and that you are proud of who you are and don't have to justify yourself. It probably won't work, but it's fine. Because you can't educate people by force or do the job for them. And try to surround yourself with some fellow lgbt just to help you remember that you aren't broken.

Dont listen to them these are people who are stuck in a small world who dont accept change and beleive anyone diffrent to them ia wrong and needs to be fixed .this is nonsense and these people need to accept that its 2018 and society is changing all thw time . U dont need to say anything to these people

Sometimes you don't need to say anything at all. You know that it is just a part of who you are, and that can't change. Embrace it and be proud of yourself.

Tell them, "If it can be cured or fixed, then why aren't there any cases showing that they have turned someone who is (whatever your sexuality is) straight?" Hopefully this helps :)

Well, if they need scientific evidence, you can tell them the World Health Organization does not consider any sexuality as an "illness" or something unnatural that can be fixed, they regard any orientation as innate and natural instead. They have come to this conclusion after a long scientific research, so we can trust it to be the truth! And talking about it with them might help, you could try to ask them why exactly they feel like this is wrong, and through reasoning you can help them see that there's nothing wrong in different sexualities. Not everyone might me be willing to listen and open their mind, but there is a chance that someone will!