How long should people wait to call the other person? I am confused..

Babydoll4ever

Hi, I hope someone can give me some advice on the followings...thank you!

I have post before but I just want to confirm again, there are just a few things I am really confuse about...

I've met this guy about two weeks ago in a club, he got my email, wrote to me and we went out 4 times already in just two weeks.
He kissed me and said he really likes me and that he is not seeing anyone else. I don't know too much about him, and I would like to know more. He seems very gentle and kind and sincere everytime I see him, and I really like spending time with him and I am very much attracted to him. This is what happen then, I haven't seen him since last Saturday night, and I told him I couldn't seeing him until tomorrow night (Thursday). I told him before that it'd be nice if he'd call me but up till today he only text message me once saying goodnight and that he missed me, that was on Sunday night. After that, no contact, no emails no msn. I tried phoning him twice but he didn't answer nor did he reply my text message. I had this experience last time when we didnt' see each other for 2 days, and he end up telling me that he didn't check his cellphone, and that he'd definitely call me more often. I decide not to call him until tomorrow and see what happen...although some say that I shouldn't just wait around, but I am the person who likes to plan things ahead, if we said we'd meet then that's how I plan my night, and I feel uneasy if someone just doesn't call to confirm at all and I am not sure if I should consider it still planned or should I consider it cancelled. I don't want to sound too clingy (although I am the clingy type of person) by calling him even more, I felt that I already called too much although he said it's no problem.

So here are my questions:

1)If he really like me as he claims to be, how come he doesn't call more often? He did seem very sincere and so on, and are guys like that normally when they first started seeing someone? Is it normal for a guy to no contact for 4~5 days in a roll? does it mean he's losing interest?

2)I normally am the type of person who just say how I feel, but the more I hear about people dating and playing hard to get and not sounding desparate, I feel like I can't call even if i wanted to (not that i want to talk to him 5 times a day), it makes me feel that I have to just totally block him out of my mind even though I think about him alot, and i get confused...like is it true that we really have to play "games"?

3)We haven't sleep together yet, but I am afraid that the physical part is going faster than the mental part, of knowing each other anyway, and he seems pertty shy too, at least he doesn't sound like he's after sex, but from the sound of this, is it very likely that he's just playing games and not serious? Or is it just normal and that he's probably busy?

4)I am only kindda anxious because he "said" he's serious, oh I don't know, I am an Asian girl, I haven't dated alot of caucasian in my past, and thus I am not too familiar with these kind of situations, he said to me that it's not right to be seeing more than one person at a time and he's not seeing anyone else...so does it mean I should also trust him on that and just wait for him to contact me?

5)Finally, I guess I am just asking the same question over and over again, do you think he's really into me? or am I just being alittle over reacted for him not calling for 4~5 days?

P.S. I am also new to this city, and I don't know many people here, no friends no family, I suppose that could be the reason too why I just get lonely sometimes, just thought to give alittle background here if someone is to suggested that I should go out with friends and forget about him, haha.

Thank you very much, any advice is good!