My friend ignores me now that he is famouse?

I don't know how famous your former friend is but it sounds like he appears to be popular on the internet. Just let it go. Stop trying to contact him because if he wanted to talk to you he would have texted you back by now. Fame is not everything and he will either lose his fame soon or become worn out from having people he doesn't know want to talk to him and all that stuff. Or both. Then he will want to have REAL friendships with people who like him for the person he really is, not just because of what he does for a living. I know that it can be irritating, hurtful and confusing when a friend ignores you for a reason that doesn't seem like a valid excuse. But that's just how some people are-they don't need a reason to be rude and cut somebody out of their life. It doesn't make much sense I know. Focus on the friends you have now and make some new friends. You will meet others who are cool and will not ignore you.