I loved this at the beginning, but gradually I went off it and have now dropped it. It's an understandable problem . . . basically, as soon as the MC decides that the way out of her predicament is to try to rehabilitate the bastard so she won't wish him dead any more, she has to spend time with him, and you have to develop his character and give him enough nuance somehow that it might be plausible you wouldn't want him dead. The problem with that is, it's NOT FUNNY. I LOVED watching that creep buy it again and again. Dealing with him as a human being is no fun.
Meanwhile, her romance has no oomph because the guy involved has no impact as a character. He doesn't know about the loop and the MC is manipulating him with it, so he doesn't feel quite real, and he doesn't have enough individuality to overcome that handicap. He's an outsider, a side character with no real impact on the plot. In "Groundhog Day", Bill Murray broke the loop by getting the girl, and he got the girl by becoming a worthwhile enough person to be worthy of her love--so even if she wasn't aware of what was going on, she was IMPORTANT. This guy feels like just an obligatory love interest; he's not just unaware of, but irrelevant to what's going on. So it's hard to care if she gets with him or not. Heck, he's so marginal that I've seen lots of people start rooting for her to get with horrible obnoxious boss, which is a revolting idea but understandable just because obnoxious boss gets so much more screen time and is a far more dynamic character.
So yeah. The romance is flat as Saskatchewan and the funny was draining out, so I quit. It's such a pity because at first it was so damn awesome and hilarious.