Read the manga for
Watch the anime for
Imo the manga was, in some ways, more entertaining and straightforward, no chapter fillers.
The anime has more details, making the story much clearer and detailed.
I loved both endings, as they seem to all be happy in the end, albeit more of a bittersweet feeling for the rejected girl. The anime ended on a more cheerful note, and I prefer its route as well.
Anyways, if you liked the manga, I definitely recommend checking out the anime. Cheers.