"For all the years I've suffered" ya fucking right. She left you so what? At least she didn't cheat on your or conned you for reals. A lot of people have dealt with worse, stop acting pitiful like it's the end of the world. This girl also is just....I don't even know if I can call her stupid or ignorant. My god "I will not hesitate to tranquilize you" deary...WHY THE FUCK DO YOU EVEN STILL LOVE HIM!
Mc is pretty much just an airhead when it comes to love, he's the type that will continue to pursue one goal and not think of anything else while achieving that goal. For something to be a harem, the guy must reciprocate the feelings of all the girls that show interest in him as well. We can clearly see that he doesn't hold any of the ladies into a romantic aspect (at least for now)