Rin: Got a boy for herself.
Momoka: Gave up on Rin and pursue (convenient?)love somewhere else.
Rin: Doesn't like that.
Momoka: Told Rin loud and clear she needs love. Promised to stop if Rin gives her love instead.
Rin: Promised to give her love and start the relationship.
Momoka: Poor attempt at getting the love out of Rin.
Rin: Didn't give any love. Instead of asking for Momoka to take it slow, calls the relationship superficial(key point).
Momoka: Ogey, you're not serious about this and didn't keep your promise so bye I'll go date someone else.
Rin: *Surprised Pikachu face
yesssirrrrrr loud and clear