Basically

So there's this boy I like, who's in the year below me, and we're quite good friends. Anyways, he's told people he just wants to stay friends because of the 'age gap' whatever age gap there is?🙄
Anyways, he always replies really quick, his nan says he mentions me a lot, he looks at me quite abit, cares alot about me and double texts to keep the convo going? 
What does this mean? 
Need a relationship guru to help me out😂🤗