What would your advice be?

I have a couple of friends. They are a couple and been together for about 8 years. The bad part, her and I started to really like each other. We admit it to each other. She still loves her boyfriend and is wanting to stay with him. I don't want to break them up. We went on a small outing which we were in the car together with me driving for an hour each way. He basically ignored her. I tried to hint at him to not, but still did. They vape but he held onto it and never offered it to her unless I said something. He sat up front to talk to me. We get along great. We stopped at a store and she asked him to go inside with her. He refused. I had to ask her questions to get her involved a little with the conversation. I tried small hints that he should pay some attention tonher. He never looked toward her to see that she wasn't doing well. She says it's his anxiety that makes him that way. I don't see it that way. Apparently he won't go to therapy. She's hurting every day from his lack of interest. What would you do? What will fix their relationship? How can I get him to see what he's doing?

What would your advice be?
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