Is he in love with her? Yes, deeply and almost reluctantly. Jaime finds himself drawn to her in a way he can’t easily explain, as if she’s the only person capable of looking past the Kingslayer’s reputation to see the man beneath.

Does he love her but is unsure if she loves him back? Absolutely. Jaime is plagued by doubt, unaccustomed to the vulnerability that comes with loving someone who hasn’t explicitly returned his feelings. He isn't in love with Cersei anymore.