Why we are seeking company and love so much?

In ancient time, when caveman was a lonely survivor life was way much tougher than now. Just imagine yourself you are on a plain field, is getting dark, everything is wet, you are not able to light a fire with your flint, you are shivering, there is no cover and you hear the weird sounds of a whole bunch of animals, you don't know. Which one is dangerous. Which one is going to kill you during the night. Some of them are lonely predators. Some are forming hordes, like baboons. Even a chimp is capable to rip off a human's arm. Can you feel that urge to shit yourself? Probably early man seen apes, monkeys and all kind a phytophagous that when they have company they can defeat predators with a greater success. So, when you were rambling across the continent alone and finally met with your kind that was a reliefing moment. You figured company means a bigger chance to survive. And because human beings are emotionally advanced creatures, sooner or later you were creating bonds with other members in the group. Friends, hunter mates and a female. So, first human formed groups for benefits, but being a member of the group created emotional bonds between the members of the group. Early humans might seen a moment when females of some hunters came to us after returning from a big and dangerous hunt and greeting them, showing worry. Than the lonely hunters felt: Hm, that's must be good. So you have had the needs for love. When you finally found a woman for you you felt if I do something which makes her happy it lights a very good feeling inside me as well. So, giving love is the best. It has so much positive energy that you become capable of doing things you never imagined. Actually love itself is a positive energy. That's why love is also acts as a very addictive emotional drug. You feel the positive energy flowing towards you, towards your beloved ones or around you and your subconscious knows this is good. Love can transform the world completely. And once you've tasted you always want to feel it. That's why humans are constantly seeking for love.