Does he actually want to hang out? Or is he making excuses and trying to be polite?

So there is this guy and I met him about 3 weeks ago and he has showed signs of flirting/liking me. Since the first time we met, we have hung out another time with his sister (who I am friends with) and we were flirting a lot that night and he texted me later saying that he was really happy I came over. Then I wanted to try hanging out with him ALONE, at my house, and he couldn't come on Friday cause he had a tutor lesson and he couldn't on sunday because he had a lot of school work to do. I get this because he was ACTUALLY busy. And he says he's really sorry when he can't hang out and he says that he really wants to see me soon though. He also says things like: "Yeah I went to this movie with my friends and it was really good. We should really go to a movie together sometime". He will say things like that but then when the times comes/I actually ask him a real day, he says "Teah thats sound great! I'll let you know" and then he can't... :( and I really wanna hang out with him alone this weekend but I don't want to seem needy/ask him again!! And he's not the "planner" type.

1) Do you think he ACTUALLY wants to hang out with me alone?

2) Does he seem like he's still interested in me?.... he replies to his texts a lot slower now (he's immediate responder either though) and he just uses let smily faces recently.

3) How do I hang out with him alone/get him to actually make plans this weekend without seeming needy? I don't get it cause he is the one that says he wants to see me!!!

PLEASE help me with this. Thanks so much for the cooperation!!