Each MC gender/orientation combination has 3 possible LIs, and each of them have an easy, medium, and hard one. How much time you have to spend with them to unlock a relationship depends on which one you're working on. There are also events that take place in the morning before work that let you get a few more points for your LI. For instance, on the first day, if you go to the gym, Johan and Steph are there. If you choose to stay there you have an opportunity to get an extra point with one or the other of them.
Even with the "hard" LIs, though, there is time to talk with other people. Maybe not enough to see them every day, and certainly not enough to talk to all of them, but you definitely can be friends with people who aren't your LI.
Tlaero