BF-732 When a girl who I thought was just a friend confessed her love to me, I gave her an ambiguous

The day my best friend got dumped by Shizukawa, she confessed her feelings to me. I had never seen Shizukawa as a romantic interest, so to be honest, I was confused. I thought I would give her an ambiguous answer to brush her off, but in the end, we just went with the flow and started going out. Sex with Shizukawa wasn't so bad, and without being clear about my feelings, I got immersed in our relationship, where we would have sex whenever we met.