Well, I think NOW, Sol is hurt too.
She didn't want to date anyone at first, but then got persuaded to give "love" a chance. But she just learned that if to have a girlfriend means you gain something, it also means you lose something else : the freedom to hang out with whoever you want, whenever you want. She just lost a friend because she's in a relationship.
I don't know if she will take well that loss. A natural reaction would be to say "after all, I wasn't ready", dump Soo, not date anyone and isolate herself.
Soo took a forceful approach to the problem, but it may turn against her.