As we grow we change. All living things are blessed (or cursed - depending on your viewpoint) with this characteristic.
I look on in awe as the rose bush I so lovingly planted gets new buds and grows bit by bit into a beautifully scented centre piece. As time passes it's important that I prune the rose otherwise the growth and well being of the plant could be compromised.
Are we any different from that rose?
There are times in our lives when it becomes apparent, that by pruning back on some of our relationships it would benefit our personal growth. Some relationships over time definitely become detrimental to our health. Spiritually, emotionally or physically - however it is affecting our growth - should we not learn to nurture ourselves and cut off the dead wood that may be restricting our growth?
The difference between plants and humans is that we have an emotional heart and a headmind that trawls us through the history of our relationships with others. So, though we know it would be in our interest to move on our heads say things like, " But they were with me when x,y & z happened, I've known them for years....!"
STOP! Look at the relationship now and treat yourself as you would that beautiful rose. Are you being weighed down by an old, once healthy, now toxic relationship? Well cut it off! Remember the good times fondly, and move on and become the person you can be without the old attachments.
"Relationships are like glass. Sometimes it's better to leave them broken than to hurt yourself putting it back together." - Anonymous