A "should not be love" trope is what they offered in this drama. But what should we highlight more here is how they taught us that we should put our true feelings above all.

We shouldn't be embarassed about loving someone, or feeling the fear too much.

Don't waste your true feelings ever cause that is your source of happiness. If something gets wrong, or difficult, maybe you just need time to be alone and slowly fix the things while becoming better everyday.

Then, be proud of yourself if now you can be with your right person. Cherish her/him, maintain your healthy relationship that is built on an understanding between two parties, not on an obsession.