Sometimes, I feel like this is one of the happiest periods of time in my life: no need to buy houses or cars, no need to make money, no need to think about how to get promoted, and no need to maintain official relationships.

WOnly when traditional Chinese festivals come, I onlydo I need to visit my parents.

No matter whether people who are rich or in a higher position, they all have nothing to do with me, o. Of course, no matter how pretty ordinary a person I am, I have nothing to do with them as well.

higher position is a comparison and thus needs something to be compared to, so you could say "higher position than me".

the added "as well" at the end seems apt here as the two sentences are related.

I am not good at dealing with complicated interpersonal relationships, and I alsoI don't have much time to dofor it orand I am indeedsimply not into it, so f. For me, the simpler, the better.

be careful of your conjunctions here, better to break up into multiple short sentences than have a very long one.

Even if all peopleveryone ignores me, and looks down on me, I can still live happily because I have things I like to do, and I won't ever feel bored.