Well this complicates things, if you live your life in secret and don’t tell them anything about your love life or any crushes, they might get suspicious, and if they get suspicious and ask something like why don’t you tell us anything about your love life, any crushes, tell them no, especially if it’s a lie because now you have some leverage to use on them. If in the future they found out, you’ve got them where you want them. They will get mad at you for lying, the will be mad and ask why, and you tell them that it’s because they wouldn’t understand or give the support you’d need, it may not go any further, but more likely they will be mad, which is when you use a simple guilt trip like asking if they love you, if they’re any sort of respectable parents they will say yes, otherwise, this will not work. If they say yes, you should say something like well I’m not straight so I don’t think you do love me, you just love what you want me to be, not what I actually am. This might not work, but I don’t know anything that will work without fail