Here are some historical novels with a happy ending where the MC and the ML get married "reluctantly or forced" either due to a marriage of convenience,an arranged or a forced one ,estranged,awkward and sometimes hateful at first but their relationship improves and they end up falling in love together .

-One sided  love is also included here ,if the MC or the ML is in love with the other but it's unrequited. 

-This list doesn't include novels where the MC and ML are in love and  get married willingly 

*feel free to recommand similar novels in the comments i would apreciate it*