How do you dissolve friendships that do nothing but irk you?

I am trying to work out why I have so many “aggressive friends”. For years I guess I was considered very assertive and aggressive. I also had a job that demanded this. However, I am experiencing life changing mind sets due to partly depression and also introspection into myself and what I do or do not want in my life.

I have bipolar and a couple of friends that I did keep in touch with refuse to acknowledge this or register it. I slowly want to move away from them, I am tired of being told “Life is a mindset” keep a positive attitude, have you been out today? If not why not? Yes this could be caring. But “Now you are better? You are OK?” and “just change your life!” is really starting to aggravate me.

This kind of care I do not appreciate and is not helpful to me at all. Because it is also done with such aggression. The question is, then how do I remove or dissolve these long term friendships that actually unsettle me more than anything? In an unobtrusive way. Or not react to their constant badgering and seemingly full access to my life and what I am, or am not doing? (since they are on my blackberry messenger for example). The problem too is I feel how I react emotionally to their comments. Did anyone else have a similar experience they’d care to share?