General question, general answers.
Specific question, specific answers.
Relationship dynamics are understandable and amenable to enhancement. While predicting exactly what will happen in every situation is not realistic, a relationship can be analyzed and worked on as well as anything else. We don't have to approach relationships like they are some great mystery. There will always be some uncertainty and risk, but we don't have to pretend that we are flying blind and stupid. However, for any given interaction you want feedback on, if you want specifics, you have to give specifics.
My general advice: see the other person as being a person just as real as you, with equally valid desires, thoughts, feelings, fears, etc. When you see a need, respond to it the way you would want the other person to be responsive to you (although keep in mind as you get to know each person that we have to learn their specific styles and "love currencies." Being perfect is not required. Being attentive and in the game is.) If you miss a need, apologize for missing it and ask the other person to help you understand it better in the future. Also, never, never use, manipulate, or coerce the other person. That kills trust and can taint and destroy an otherwise healthy relationship that could be long term. Don't try to control the other person. Take accountability for your own actions and make treating the other person well your responsibility. This is the best way to invite them to take accountability for treating you well.