How do you know if you are a demi god half Blood because i think the greek gods are real?

Ok, Think for a moment, Jesus he was a demigod because he was the son of god, but what if he was say the son of Poseidon or Zeus because have a look through the bible, Most of his stories are related with water,fire and wisdom.( IE. Changing WATER to wine, being baptized in WATER, holy spirit appearing in of FIRE, Always thinking logically and he was FULL TO THE EFFING BRIM WITH WISDOM.) Im not saying I think im a demigod but I don't look like anyone in my family except my mum, and I mean no one else in the entire two sides of the family. There is ALWAYS some sort of weather condition on my birthday usually rain, but its never mild or a normal day. I really do believe and I've all ways been different. I don't have many friends because of it and well I've never really felt alone with only one or two friends, and if they had a fight, well, I'd be the only to fix it.... Anyone else know where im coming from? I think I may be related to Poseidon because i've always been crazy in love with water? (and I have a small case of ADHD) Anyone out there have any thoughts? And please don't say i'm crazy.