Why is my 2 1/2 year ancient acting this method?

He breastfed until I made him wean 2 or 3 months ago. He unwillingly weaned. Today when I got home from work I went to nurse his baby sister and he kept trying to nurse and I kept recitation him No you're a big boy babies nurse not big boys.

Well he came up to me while I ws holding his baby sister had me follow him and only just started hitting me for no reason. Why is he so hostile towards me? When will he forgive me for weaning him? Why can't he accepted that he is to big to breastfed?
HE'S JEALOUS AND WANTS YOUR ATTENTION!!
Sounds like a jealousy issue, probably he misses breastfeeding because your younger one still get to and he doesn't understand why.

Try making it exciting for him, ie. take him to the store and let him pick a special cup since he no longer breastfeeds. Getting the elder child involved so the don't feel left out is the key to finish jealous feelings.
Answers:    I hope you don't mind someone who has a different vision...and take what I say with a particle of salt, since I've never parented.

All the experience I have with kids (which is closely, but is limited to children I don't make choices for) has told me that kids will share YOU when they're ready for something. Breast feeding is a special bonding time between mother and baby. It's not merely about nourishment, it's about love and the comforting sanctuary of being held at Mom's breast. He is telling you that he's very unsure within the world. You have, for all intents and purposes, rejected him, and told him that you are not willing to allow him that close bonding time, that comforting sanctuary that he craves (and that he can only get from breast feeding).

I don't think this will for always damage him...but neither will breast feeding him for longer than you would like to. This is more than spite. This is fear of being "pushed" out into the big, wide world, where on earth he can't come home to nuzzle at his mother's breast, where he knows that all is right contained by the world. One day he will be ready for that...he's just unwary right now.
I hope you didn't let him find away with hitting you. You probably shouldn't of waited so long to wean him when a child turns 1 they do NOT need breast milk or formula. He is spiteful of his baby Sister but you do need to keep relating him he is a big boy and no more boob for him and when he hits you you need to put him in time out.

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