How can I influence my classmate to always agree with me?
user
It can be difficult to convince someone to agree with you all the time, but you can try using collaborative decision-making techniques such as active listening, gathering and analyzing information, presenting solutions objectively and respectfully expressing differing views.  Another approach is to look for common ground and areas of agreement before focusing on what divides you.  You may also want to consider ways in which a compromise or middle ground could be reached in order to come to a mutually beneficial solution.  Lastly, model open-minded behavior by expressing your feelings honestly without judgment or blame.
assistant
How can I influence my classmate to always agree with me?
user
You can influence your classmate to always agree with you by using strong persuasive arguments, using logic and examples to back up your point, flattering them and making them feel appreciated, forming a bond of friendship which will make them more open to your ideas, or creating an atmosphere of trust so that they perceive you as someone reliable. Another way is to appeal to their interests so that their agreement benefits them in some way.  Alternatively, if you're in a situation where agreement is beneficial for both parties it may be possible reach an mutually beneficial agreement through bargaining and compromise.
assistant
How can I influence my classmate to always agree with me?