The past
The past or unchangeable things are the first thing you should stop worrying about. In life, there are times when you feel regretful about many things. Things you yourself have not done, contests you have not tried your best or you yourself have not shown enough love, and when they leave, you cannot heal like at first.
Even if sometimes you try to deny that you are not wrong, you have no regrets, but you cannot avoid the thoughts of "if".
However, your job now is to focus on the present, not the past. Instead of sitting there feeling regretful, take time to learn lessons for yourself. "Unspeakable" people, everyone will make mistakes, if you don't escape by yourself, you will be "prisoned" and live forever with that unfortunate past.
You can give yourself the opportunity to look back at the past to learn lessons for life and look at many aspects of a problem, but you should not use the past as a " foundation" to decide the future.
People who do not care about themselves
Sometimes you give too much affection to someone, but all you get is indifference. They don't really care about you, about your feelings. Regardless of your relationship, love or friendship... you should spend time and focus on a truly two-way relationship.
In many relationships, the more you care, the more people ignore you. Instead of focusing on such relationships, you should focus on yourself first, focus on your own values. Gradually, the right people will appear in your life.
A long-term relationship needs a balance between giving and receiving from both sides, must be attraction from both sides and both need that relationship.
What do others think of you?
This is a question that should be eliminated from the life of a happy person. No matter who you are, you can't make everyone love you. What you need to do is not worry too much about what others think of you.
Other people can say many things about you, even untrue things. This only shows their inferiority complex and does not affect your life if you do not really pay attention to it.
Try your best, do the best you can. There are many people who come to your life, have more experience than you, and give you valuable advice. You are young, still make mistakes, still stumble, you need to know how to listen. However, listening from people who truly understand and love themselves is different from listening to other people's regulations and judgments that are then sad and leaky.