* reproduce in a healthy manner ( have healthy and well supported children )
* socialize with real people ( we got facial emotions and beautiful speaking capabilities that mammals use for this )
* sport ( the other way around is unhealthy, since your muscles can become useless and you can have big healthy issues if you don't do that )
Of course that's not a complete list.
If you are afraid of doing some of those things ( not that I don't feel that I prefer to stay at home sometimes ), I think that you should consider reading some motivational books about that or change stuff in your life that suits you and make you happy. You don't solve your problems without a fight, that's just the way we live in this e-society.
I'm sorry if my comment sounds harsh.