Hi

I'm looking for a manga where the male lead is in love with someone who isn't the main female lead or already has a girlfriend. I'm NOT asking for a cheating manga. The main female lead doesn't have to fall in love with him right off the bat and I'd also like for them to end up together. Basically something about unrequited love that later becomes requited.

Bokura ga Ita and Strobe Edge are good examples of what I'm looking for

Thank you in advance!

Sprout

Female lead has a boyfriend, but falls in love with the male lead. The male lead falls for this other girl and starts dating her, but then also falls for the female lead.

GE - Good Ending

The male lead is in love with this other girl who has a boyfriend. The female lead tries to help him, and they fall in love with each other.

I've been looking for the same thing after reading Our Relationship is.... The webtoon fits your description like a glove; it's also such a good and realistic read about best friends of the opposite sex falling in love.

Sprout
Koi shitagari no blue
Heroine Shikkaku
Crazy for you

Kanojo okarishimasu.

This one is a bit of a give or take. Male MC is in love with the female lead while technically sort of dating another girl.