Holding on to things that no longer serve us

I have been thinking about this alot today. Holding on to weight, habits, friends - family. Anything that we know in our hearts is not beneficial for us, yet we continue to do it. Why is that? Deep down, is there some part of me that is afraid of achieving all I am capable of? Do I not want to be abundant, healthy, mentally and physically? Or is it enough to hear negative poison from the people in our lives who supposedly love us? You know deep in your heart they aren't true, yet they keep spewing stuff out. Why is that and how does one get past letting it have any affect on our mood and outlook?

Sometimes, just talking to my ex or certain family members is enough to make me want to hide. Clearly, they don't live with me, they don't support me, don't do anything positive in my life, so why in the hell would I care or let it have any effect on me? Really not sure, but I can say for certain it does. It is one of those mysteries that continue to plague me. Getting drawn back to the same dramas and dances over and over.

Any thoughts? I would welcome input.