Does Brambleclaw love Leafpool

No. It is true that he loved her once, but she left him for Brambleclaw. Once she did that, Ashfur could only feel hurt, and he wanted Squirrelflight to suffer, just as she had made him suffer. It is possible now that he is dead that he regrets his mistake, but it is unlikely.

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Yes. Ashfur will always love Squirrelflight, there was a period when he THOUGHT he hated her and wanted to make her feel pain, but nothing could have driven him on like love. His mind was twisted, but he loved her. Once he entered life in Starclan (Yes Starclan, if Mudclaw got in, why shouldn't he?) his mind was unclouded and he saw things as he should have before, unbiased. And he realized that he still loves her, and will always love her. Whether or not he has completely forgiven her for not chosing him remains to be seen, the fact is he loves her.