@ saph I think that their situation is similar to a loveless marriage. At some there was love but after some time none was left. And nowadays you kinda try to make it work or feel responsible for the other party but everybody knows that it is going to end soon.
The girl certainly did feel guilt and more than anything I think that they felt responsible for him as he is their childhood friend but everybody involved seems to have known that the clock was ticking on their friendship. That however, doesn't mean that they are going to hate each other afterward.
And hey maybe in future chapters they might reunite when MC gets more confident and better with people.