can anyone recommend me a drama where the ml starts out liking another girl at first but slowly he falls for the fl. 

Suspicious Partner 

So I married an Anti-Fan

You Are My Destiny 

https://mydramalist.com/48135-trab-fah-mee-tawan

loves another, looks at FL as sister, she loves/obsessed with ML.

things happen and ML will hate FL (all this is in 4-5 episode)

they meet again after years....

I'm watching it now and like much more then expected, not primitive cliche drama, really good