要写多长呀亲。我英文不咋地。给你提些啊,不好别见怪。
1) people will feel lonely,
People need care and love, without these, loneliness will eat into themselves, this may cause mental problem, such as mental disorder.
2)living alone may cause dangerous
No one can help when you sick or even more serious, you fall down in you wet bathroom.
No one can help if you realize that's a thief break into your house in midnight.
3) over expenditures.
Living alone, you has to afford every single expense by youself. Such as rental, electrical fees, daily goods and so on.
我只想到这么多了><