Well, it is hard to say. He could really be focused on his project and have no time. Or it could be something else. I say to maybe send him a friendly e-mail, nothing ranting or questioning. Maybe a link to something you will both enjoy or something and see if he responds.
What I do know is you must be careful with online friends. My husband is completely enamored with his online friends right now. This has made me completely alone. He spends all day with them everyday on skype in his office. I sit alone, unable to get his attention back. But, what is the outcome? He is happier with them than me and leaves me for them? Or they vanish? I've had many online friends. Most of them just disappear suddenly without warning. I did meet my husband online, he's the only one left, but he's also my real life person now (obviously.)
I'm like you. My family doesn't really pay any attention to me. I have a work friend, but only for work. No online friends, either.

I also know how you feel. "This person will be here for me, oh never mind." I don't know where you live, but if you live in western culture, then people are taught to only take care of themselves and belittle others who need help.