My Husband in Law - pretty similar in terms of the leads growing up together, them being promised to one another, him hating her and then falling for one another. Also male actor is the same ;)
Praomook - I really liked this one. Both leads knew each other as teens and she always liked him. He just not her. They meet later on again as grown ups but he does not recognize her right away. Something happens and he thinks she did it intentionally, while she is considered to be his lucky charm and thus the parents try to bring them together. Its very similar to My Forever Sunshine.
And if you dont mind dramas from other asian countries Id also recommend you:
Lost Romance - taiwanese drama, girl writes a book about a famous guy she has a fan crush on. Ends up in an accident and voila she and her fan crush are thrown into the book she wrote. However she ends up being the villain and he starts to detest her because he thinks she is out for the main girl. And lots of things happen. Its a good one.
I am not a Robot - Kdrama, a guy confuses a girl for being a robot. And lots of fun things and suspense and and and.
Go Go Squid - cdrama, girl sees a guy and crushes on him. She kinda stalks him and things happen that make everyone think she is his girlfriend. Turns out guy is the son of family friends who want to marry guy off to her older sister. So their false relationship becomes something continuous. Its a fun and nice drama.
Watashitachi wa douka shiteiru - japanese drama, a crime case, a family, a childhood love turns hate turns love.
