Can somebody help me..?

I had a bad childhood, parents quarreling alwys, mom too busy with priorities, dad ignoring me, etc. It was a joint family,aunt and uncle were not good to me though (i still dont know the reason y). When i grew up a bit, i realized that things are not going the way it should be with me. I shifted to a new indepdent house with parents and then on felt better. Now, its kinda stuck in my head. Always wonder what to say when my friends talk about sweet memmories of thier childhood. I love my mom very much, but i cannt help it when all the memmories gushes up in my head when disturbed and leaves me kinda rough to others. Then, after few minutes, I feel bad for what i have done or said to her. There are times when i feel at bay wtih situations, whether i am right or wrong. I have no sibs.. I want to change myself. can somebody tell me how to work on this.