Get him to like me more

Okay so there this guy . . I’ve liked over a year and h knows I’ve liked him the only problem is mine and his age gap . . he says hes not sure to make me me his when im 16 what isnt far away now. Andd well. I just want to know what I can do to make him like me more.. And dont say you cant make someone like you more.. Because you can, because like sometime he just doesnt want to talk to me, but than when I go on webcam to him hes stays there chating till I dont do what his says, because he doesnt like the answer no lol he just goes into some weird mood what really pisses me of even tho I dont give into him lol! So ye there is ways to make him like me more. But when I go hang out by his work with his neice hes all like go away’ to his neice but when I go to his work with his little brother hes all like hi katie hows you and stuff like that he eeven lets me in and lets me sit on the floor and that, but when im with his neice all he says to us is go away, but I see him staring at me thru the window, is the a possiable chance that he does like me? Because im having so many doult at the moment that he only wants to get with me when im 16 for one thing, but I really dont no I shouldnt even be having these doults because he given me no reason to. Maybe it just me,, on my past releationship. And that the fact I like him a hell a lot. Well the question really is: how do I get him to like me more? Because im not excually the prettiest girl in this whole world