Will I like Crysis 2?

Im thinking about buying Crysis 2, but first, I would like to know if the campaign is like the ones on Crysis and Crysis Warhead. If I buy Crysis 2, I will mostly play online, but I would like to complete the campaign too, but I just started playing the campaign of Crysis Warhead on a friend's house, and I didn't really like it. First, because it is us against the world, I mean, we have no teammates or anything, and I like to have them, like on COD. Second, why having a super cool nanosuit if it runs out of energy in 5 seconds? Is Crysis 2 like this? And what do you think of the Multiplayer, is it cool?