Complicated, and only cited for a contrary opinion: https://decider.com/2015/05/04/han-solo-star-wars-secret-feminist/.
Not actually that contrary. The gist of the article is that he likes Leia for who Leia is: her brains, her character, her wit, which doesn’t seem that controversial or complicated. The logical leap is that this somehow makes him a feminist. No, it just means his feelings for her are genuine, that’s all. Love doesn’t make you a feminist, it makes you human.
He harasses her. In the same way a zillion other male heroes throughout literature and film harass their own love interests. Some with genuine feelings of love, some superficial. All of them are normalizing a form of sexual pursuit that’s far too common in real life, and much more insidious than it is usually presented onscreen.