its not what you want to hear, but yes, i can see not being friends with somebody any longer due to negativity. it gets old, it drags people down. the idea is, if you cant have respect for yourself, how can you expect others to have respect for you? there are some peoples posts i dont even bother reading anymore here on PC because they are always negative so i feel like i am wasting my time responding to them.

what you want to understand is that your thoughts, actions and feelings are all interconnected. if your thoughts about yourself are negative, u are most likely going to make negative decisions leading to negative feelings about yourself creating this constant negative cycle. how can you ever possibly feel good about yourself? you may have always been treated like s**t, but the choice is yours to continue that abuse. so your friend could have left for two reasons. 1. he couldnt stand being around the constant negativity. 2. it hurt him to continually watch you hurt and demean yourself

only you have the power to change this. i highly doubt youre a piece of crap you have been told you are. make an inventory of things you are good at. like you said, you are supportive of your friends. think of other things. when you find yourself getting down on yourself, stop and replace those thoughts with the positive attributes that you have come up with instead. it will take awhile, but you can change the way you talk to yourself. make a focused effort to not bad talk yourself around friends. ask them questions about their lives instead. they will enjoy being around you more without the negativity.