Hi Edward,
Interesting subject...
First of all, I don t think being a loner is necessarily a bad thing. I am a loner myself.
As long as you don t hurt animals or little children and are not collecting body parts in jars...there is nothing wrong with that.
Why do you want to care for others?
What is your motivation?
Do you think you HAVE TO?
Do you genuinely want to connect with others?
Do you feel like you're missing something in your social life?
If your life is functioning thus far, with no pain for being a loner, what prompts you to want to change?
I believe in elective affinities. Sometimes, you do not care about others, because you have nothing in common with them whatsoever.
It is not so much about caring ( because I suppose that if someone got injured in front of you, you would care enough to help...) that is is about caring to know more about others: their lives, their pursuits. If you do not particularly gell with people at work, then, don t force yourself to care about them. Be pleasant and move on.
If you create a social circle for yourself, that includes people who have the same interests, they will be interesting to you, and you will naturally care. If you are in a dry social environment, then you might just shut down around others, because you are not curious about their lives and you feel you have nothing in common with them.
Pick the people in your life, do not let your social environment dictate your social life. Be open to meet people by vibrating positively and putting out the intention of meeting new friends.