Is it to hard to get a little attention?

keep your guard on, reduce your vulnerability to him, you never know, he might be seeing other girls and is wanting to have you in the background. god forbid but if this turns out true or that he is centered more on himself than you, this can save your heart break a little

Guys are generally blind to subtle things that mean so much to us, but to him he probably doesn't see it as a big deal. Do you see him in person? Maybe you need to focus more on your time together in person, as internet chatting can sometimes be a bit impersonal. If he's the same with you in person, its probably nothing. Just my thoughts.

tell him how you feel and if he doesn't care tell him that you love him and that if he dosen't like you that you can be friends