A psychological story and definitely not a typical romance but: Aku no Hana
I remember "Love Hina" was pretty famous some time ago. There were not only two girls in love with the guy, but a bunch of them (I think that they did not like him at first, but their relationships developed with time).
Ranma also had two girls, Akane and Shampoo.
In "My dad is too strong" the main character also has a bunch of girls after his ass.
And you would probably not be really interested in the next ones, because I do not remember there were any love triangles, but some nice shounen with male main characters who give that vibe could be "Solo leveling", "Promised orchid" or "Eleceed".
posting this for the second time since no one replied to the first one {i'm desperate} any love triangle where 2 girls like one guy? I heard this is really common in shounen manhwa and mangas but i'm an avid shoujo reader so i'm not sure where to look. I'm only used to MFM love triangles so i'd really love some recommendations. The manhwa/manga doesn't really have to be centered around romance . thanks (づ￣ ³￣)づ