1, I want you by my side.
I miss you, by my side.
I miss you, by my side.
The three sentences have different meanings, as follows:
1, I think what you are saying by my side is that I want you by my side.
2. I miss you What I express around me is that I miss each other very much and hope to be by my side when I miss each other.
3. I feel that you are here, and I am here to express that I want you to be by my side all the time.