I know you must like seniors. A normal girl with a boyfriend will immediately feel disgusted when she sees such remarks. And you didn't.

So from a rational point of view, it must be your current boyfriend. You should cherish it and try to completely transfer your heart to your current boyfriend. Then, of course, seniors don't need to pay attention at all, let alone how to reply.

From the perspective of following your heart, you can just say, "Gee, then I really broke up. Do you dare to take over? " Then he will definitely reply "Dare". Then you say, "Then you can be my spare tire." Then we'll see how he responds. This problem is quite tricky. In fact, you must combine your understanding of him and judge whether he really likes you according to his answer.