This February, love is in the air — or in the case of online matchmaking service Datamatch, it’s in the algorithm.

Have a date and don’t know what to wear? Anxiously rummaging through your closet—and your roommate’s—ten minutes before he picks you up? Here are a few dos and don’ts for looking the part on occasions when it matters most:

Relationships in college often go undefined; it’s surprisingly easy to go on 10 dates with someone without considering yourselves a couple, or you could be dating your significant other for a year without having ever gone on a date. We tend to avoid labels at all costs—but without labels, how do we know if we are or aren’t together?