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Unfortunately relationships need two people that are willing to work on the relationship and it seems like he is no longer willing to do that and it's in part because when he needed time you continues to contact him and like you said you acted needy and didn't respect that he needed space. If you would have given him that space no matter how long he needed he might have given you another chance but I think you are right that he wants to meet to tell you he is no longer willing to give the relationship another chance. What you are going to have to do is respect what he says and how he feels and what he wants to happen from here on in, if he does say he wants to break up ask if you can remain friends after the breakup and if he is willing to do that what you are going to have to do is show him that the way you acted before is not typical behavior for you. If he sees that you are the same person he fell in love with he may decide to give you another chance or start fresh and with a clean slate.