hello i can relate to your problem as i do same thing..you have obviousely been very hurt by someone in the past and this is your safety trigger as you don,t want to be alone but don,t want anyone to close either..
trust issues shall always be a problem unless you see a councillor.

no one likes being alone but its like a six foot barrier that you won,t drop down and let anyone into your life..

my husband was an emotional abuser and its taken me years to realise that he still controlled me even though separated 6 yrs now as i thought everyman was the same as him. the self confidence takes a severe beating and you have a long lonley road ahead unless you take control.

see a councillor and talk over your problems with him/her and you will overcome this. im so glad i did.
hope this helps you.

i agree maybe you should see a therapist to find out why or to help you overcome what your doing.

I donno if u do this bcoz u've been hurt by some1 in the past..it should not neccesarily relate to ur probablem..but even if its true.. someone hurting us badly doesnt provide us a license to hurt others( and in turn get hurt ourself too) Sit back and think..when u pull someone...why are u doing it..is it coz u really have liked the person..or just bcozz ur not being able to handle your lonliness.If its former one.. then again..when u pushed the person away..what was the reason for it? think...was that a genuine reason to have a break off...or was that just bcoz u were bored with the person or u found someone else..or that u felt..he isnt the rt person.Remember 3 things 1.No one can make you feel complete...except you. 2.Whne you accept someone..you've to accept them with all their _ve aspects(so one day when u suddenly discover one..dont say good buy) 3.Its really difficult to find the ritght person...specially when the wrong ones are so cute.

You say u don wanna keep hurting people, that exibits the nice person in you.SO,STICK TO THAT NICE PERSON WITHING YON.Let not the momentary feelings over rule u.Next time..yoy feel like pulling someone...dont do it at the first instinct..wait and watch for couple of days..if you continue to feel the same.And also..when you feel like breaking it off with some one..then too..be patient& wait.Handling situatins patiently.. is the secret behind taking a relationship long way.All the best.