i personally dont think he'll become a love interest (she's clearly NOT interested lol) but he prob will have some unrequited love dragging on for a while if anything
I think she'll become a love interest for him but not him for her. Bro needs to leave the love birds alone, they already got a third wheel to deal with Σ(  ̄□ ̄||)
I hope they don't make second ML a romantic interest (as in him starting to pursue the FL after realising his flaws) bc we don't need that trope..