I am very affectionate with family and friends. I always greet company with a hug and a kiss, and do the same when they leave. With strangers I can be just as affectionate, unless I feel too much negativity in them.
When we get close to someone, our energies entertwine like smoke from two fires close to each other. This is why it is important to be around people who will give you positive energy and not negative energy. This transaction of energy happens whether you are aware of it or not. I used to have a big problem with depression, until someone told me that I was absorbing other peoples problems, and not cleansing myself of them. It's the healer in me. But once I was aware of what was going on, I still absorb the pain and suffering of others, but I know how to get rid of it to keep myself healthy.
My boyfriend has a serious need for personal space. He is very affectionate, usually, but sometimes, he just needs to be away. At first it was really hard not to take this personally. It was the first time I had ever been shut out by someone. Everyone in my life is very open and use me as their own personal therapist, I did not understand why this person, who means so much to me, would shut down on me like that. But I read in his astrology that Pisces absolutely need their space. I read it everywhere, Pisces need their space . . . So I learned not to take it personally. I do not let it bother me when he shuts down emotionally, and he loves me for letting him have his space without condemning him for it or starting fights over it.