Why can't they get that age is nothing but a number?

So I'm 14 about to 15 in w months and i got with a 27 year old guy. He's wonderful, everything I need, he buys me things. he tells me he loves me and he's just a genuine nice person and I love him with all my heart and I know he will never hurt me and I won't ever hurt him. No. not the type of big brother love or father love thing, it's real love! I can feel it, I never knew i would be going out with a guy like him but it's probably the best thing yet. My friends even knows about him, nope. I'm not ashamed. Most of them say thats nasty and thats but i don't care, I know he loves me and I love him. My parents doesn't know but hey, it's my bussiness not theirs and if they don't like it, too bad. I'm not giving him up. Don;t you know that song by bruno Mars- grenade? Well thats how I feel and it's like no one understands, how do I get ppl to realize to stop judging me and him and just accept my relationship for what it is.