Im in love with a straight boy?

Hey im 15 coming on 16 and i am gay and in the closet. at school there is a sweet, cute gd looking boy in most of my classes. ive started to fall in love with him. we've laughed and talked together. he always talks about girls and sex when with other mates and when hes with me he changes and acts all flirty with me. he even kissed me on the neck in the middle of class. i know on the outside he seems straight, but deep down inside he knows he isnt. he also always looks at me in class but pretends he isnt when he looks back. i love him. hes giving me signs that he likes me back.