If this friendship between you is hard-won, after years of affection, your best friend is the one who wins her own heart the most. She knows what you are thinking and what you are going to do. This tacit understanding is really hard-won, but it is likely that after a period of separation, you are not influenced by the same culture, so your values are likely to be different as time goes by. Are you still best friends?
No matter how much you don't want to give up this friendship, you should know what it means to be a best friend. Boyfriends may be true love, but after breaking up, they are nothing. So girlfriends can walk together, that is, they have the same personality and preferences. But after different cultures and education, their values are very prominent and their thoughts are different. How do they chat? Can't we chat or be friends? So make a choice after you recognize it. A bosom friend is rare, but if it is a true bosom friend.
In my opinion, a very positive person is very likable, no matter whether he has many shortcomings in other aspects, he is very influential and positive in optimism.
When you feel disappointed, it's hard to give you an encouragement and resolve your troubles. Similarly, negative energy makes people very negative. Everything you say can always find its shortcomings. Hesitant, the result will naturally be biased, and not all bad results will appear.
The above is my opinion, I hope it will help you.