I was going to offer some suggestions about why you may be the person responsible for putting barriers up to change. You know the story...you are responsible for the situation you find yourself in.
Now I've had a rethink. After careful thought I have come to the conclusion that if you are happy in yourself, you a healthy and you are not having a negative impact on those around you then I can't see a need to change.
It might sound strange coming from someone who has undertaken a fairly radical physical transformation as you would expect to pressured into doing the same. That was right for me and only me, it's not for everyone and we all have our own journeys.
My message is look around you, appreciate what you have and don't feel undue pressure to change anything unless you are happy to do so.
Stay happy,stay healthy and love life.