 If you liked
Ai no Tame ni
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 ...then you might like
Motenai Riyuu ga Oosugiru!!!!!
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Both mangas are similar because the first oneshot are both about a girl unable to find her own love interest, even though she herself hangs around a lot of guys and help them find girlfriends by playing matchmaker. There is also a guy that helps her/hangs around with her for a while without asking anything from her, and she unconsciously falls for him. Both are similar in most aspects, if you enjoy one, you're sure to enjoy the other.