First of all, you need to ask your roommate out for dinner regularly. Although everyone has graduated, if they are still in a city, they need to eat out regularly. We can sit down together, order some favorite dishes, and then talk about our good time in a dormitory. In this way, the relationship between roommates can last for a long time, and they will not feel strange because they have been separated for too long.
Second, you need to talk to your roommates about work and life from time to time. On weekends, or after work, you can also talk to your roommates about home or work through your mobile phone. Generally, students who live in the same dormitory are all in the same major, so there will be many topics to talk about at work. In any case, keeping in touch frequently is the best way to maintain the relationship.
Third, roommates must go to each other's wedding when they get married. After graduation, everyone started a new life. A few years after graduation, everyone entered the marriageable age. Therefore, when roommates get married, they must go to the wedding site to send sincere wishes. This can also maintain a good relationship with roommates.
So even after graduation, the relationship between roommates can still be maintained. what do you think?