Why is it so Difficult to tell

I am not that young anymore (at least not a spring chicken).  From time to time I encounter people used to party with.  Its really difficult to tell them what has happened to me.  Its MS..Can't do like I used to..No more drinking and smoking...no more dancing....hell..even walking is limited.

I used to take care of others.  I know they appreciated the friendship I showed them.  We lost contact when my life changed.  I don't know what issues they have faced.  Why, then is it so difficult to let them know.  I am afraid.  Don't like being left behind.  I try to spend my energy on today/tommorrow.  Maybe I shouldn't look back.