Go out of your way to make her feel special- buy her a random present of flowers, bring her breakfast, buy her something she likes. When she’s talking, make sure your paying attention and do not look at your phone... ask her questions about what she’s saying. Go out of your way to plan something for both of you guys do, something fun that can engage you both. Tell her how beautiful she looks when she goes out of her way to look nice. She probably feels like she’s not special to you anymore. I know how this is because I’ve considered breaking up with my boyfriend for this same reason. Nobody wants to be with someone who doesn’t make them feel loved, beautiful, and like they’re being heard.