The Alpha's Circumstances - this is kinda like what you described but I dropped it cause he kept cheating on his lover
https://www.mangago.zone/read-manga/the_alpha_s_circumstances_novel/
Thank youu u right that's a lot of cheating huhu was looking for more holding back and moral dilemma of wanting to be loyal and still being in love with their partner but can't help the pull of fate and just ripping apart from the inside huhu this one really just jumped from the get go haha thank you for the recommendation
ah yess i totally get what you mean, i just finished reading a manhwa that has kinda similar elements that you were hoping to read.
How sweet is a sugar daddy? - the artstyle isn't like every other bl manhwa but it gets better as the story it proceeds. All in all the plot is realistic and I liked it.
https://www.mangago.zone/read-manga/how_sweet_is_a_sugar_daddy/
hope you like it too. <3
Are there any omegaverse where their fated mate have a lover? Extra points for enemies to lovers ehe. Need that extra step to romance lol thank youu