I just want to make a quick comment on this essay. After reading, I'm sort of confused on which position you argue in this essay. It may be typos, but it seems like you are trying to agree with both sides of the argument, which I'm not sure is the best way to go about it. Your first paragraph argues that living in apartments is lonely, but your second two paragraphs support the facts that it is a social environment. You're contradicting yourself throughout the entire thing.
Personally, I think it would be best to pick one side and only argue that side instead of arguing both. It doesn't seem like a strong essay when you are arguing for both sides in such a small essay- i.e. you're not really developing both arguments properly. If you only argued for one side, you'd be able to create a stronger, more detailed essay.
Whilst I believe that living in flats is a lonely experience, I firmly believe that it has the sense of social group and has great experience.
For example, here you are saying you do believe it is a lonely experience and you also believe that it has "the sense of social group".
The aforementioned evidence shows that although living in apartment can cause a lonely life, but it enhances sense of community. Hence, do not worried to stay in flats because it can also increase sense of social group.
Also, here you are saying that apartment living is lonely, but that it (what is the it? being lonely? or apartment life?) creates socialization.