Your emotional state is yours to control and change. Depending on others to feel good is not the sign of a mentally healthy person.

Editing aswell: I'm sorry, I should have been clearer but it's quite lengthy to always be precise and include the necessary disclaimers: Of course everything has its limitations. Humans are social beings, so we like social interactions. During the limited time of sickness, I thought it was apparent that social interaction shouldn't be necessary to get better.

Example: I think it's possible to feel good when doing a walk alone in the park. I think it's possible to feel good when being alone sick. Suffering is often a distinct choice: Do I pity myself for standing in the rain or do I love the feel of fresh, wet water?

Edit2:

   Can someone not recover from a disease without   interaction, sure you can if it can be cured in a short duration, no otherwise

I think you are giving humans too little credit. Social interaction is very important, but it's quite possible to live alone. People don't actually go mad when you leave them alone - given that they are adults and they have sufficient other sensory and mental stimulation. People get used to a lot.

Example: Someone living completely alone at home, getting his meals delivered because he is too fat to leave. I'm not saying his life is awesome, but if he gets sick, there is no reason his recovery should in any way be significantly slower than the one of social people.

It's all a matter of getting used to things, self pity is usually the only culprit of an unhappy life.