It is absolutley nothing to be concerned about! He is just learning how to wrap you round his little paw! Probably the only way to deal with this problem is to keep your bedroom door shut and ignore his crys, as hard as it is! If you keep giving into him he will learn that if he keeps crying he will get what he wants in the end. After a few days, a week perhaps, he will learn that this won't work and you should be able to enjoy a good nights sleep!! Another solution may be to try and tire him out before bedtime with some energetic playtime.
When he gets a little older, he will more than likely calm down and will come to realise that your bedroom is for sleep,not for play! It sounds like you have a perfectly normal little kitty!