When I was in Peking University, there was a saying called "taking eight credits", which meant falling in love. It means that the energy cost of falling in love is about equivalent to an eight-credit course. If you think you can't afford this kind of energy, then you should seriously consider falling in love. Of course, different girls have different expectations for boys' energy input, but it is difficult to judge in advance. "Eight credits" is probably a relatively general standard.

There are also many students in the department of mathematics, who have a good relationship during college, and some of them can handle their studies, love and some after-school life well. Moreover, in terms of available time, mathematics is much more than chemistry and biology, and I have never seen every bachelor of chemistry and biology.

Personally, as long as you have the consciousness of getting eight credits, your attitude towards this relationship should match that of the other party (don't just say fun, the other party just wants to find true love to talk about marriage). It's no use worrying too much about other things.

Personal needs and devotion to feelings will change, and you can't see clearly before feelings begin. Whether the two can find a suitable mode of getting along can only be known gradually after they are together. So let's start when two people think it's appropriate. (Anyway, most campus romances have no happy endings (all wet))

But falling in love is a necessary experience in life.