please recommend some intense romance dramas? Jealousy, obsession is a must!

I'd say 'Witches Love' is a good one. The girl has a sassy peronality at first which later turns into a timid and caring one and the relationship turned from hate to love . The ML was possesive/ jealous and determined about the girl from very early on despite the obstacles (including  destiny/ disaproval from others etc)

If you didn't like the first few episodes I don't think you'll like the rest of the show. It's ok! If you won't completely enjoy it, don't waste your time on it. I'll try to suggest some more if I can remember!