one who simply puts in too much effort for a girl they will never end up with

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

A guy that puts himself in a submissive position to get/keep a girl.They put too much value into a female.

The word simp came from the name Connor SIMPson Gilbert He was the biggest “simp” he would leave to boys to go on FaceTime with chicks and he would stop playing video games with the boys