Can you love someone and want to be with them but also to want to hug/kiss/sleep with another person?

I posted a question the other day about my husband who thinks this is ok. He has kissed another woman and will sleep with her if she wants to. We have a very good life (in answer to hmmm...) and he doesn't see what harm he is causing by sleeping with another close friend. I can't explain why to him beyond saying I find it really hurtful. He says I don't love him if I don't accept his uality ie: his need to have with someone else. I know everyone says get rid of him but there are reasons why that is not so straightforward. I don't feel able to find a middle ground at the moment. If I don't accept it he wants to split up. But then at the moment I am 99% sure he hasn't slept with her, so I'm hanging in there...