Books where the heroine and the hero's best friend have a great sibling-like relationship? - Contemporary/New Adult/Young Adult

[Izzy ♡ boom, boom, fucking boom]

Looking for books with the above, such as the Hashtag series - Cambria Hebert (Rimmel/Braeden) and With Every Heartbeat - Linda Kage (Zoey/Ten).
Any recommendations appreciated :))