Just seeking general advice?

Me and a friend started our friendship with a mutual friend. I've been working out and she asked if she could join me, of course I said yes. Yes, she had a boyfriend at the time. We would have a good training session and meal prep afterwards. Great woman, motivator, and just fun to be around. So I've developed an attraction to her, but I respect the boundaries of her relationship. I've invited her boyfriend to come lift with me and he never does. Well, her relationship has went south and he threw all over her insecurities in her face and her health issues in her face. I really like her and she's afraid I'm gonna disappear. We've gotten real close and How do I prove that I'm here and not going anywhere? How do I show her how incredible and strong she is?
Just seeking general advice?
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