Can I stage kiss a guy in a musical even though he has a girlfriend?

the musical is the wedding singer and we play the bride and groom. The director suggested we kiss but was optional. We are both teenagers so it’s awkward and we act nervous but smile. I want to stage kiss with him to relieve tension and make the scene more believable.
I also want us to get comfortable with one another, but he has a girlfriend who’s in the show. I want to ask his permission if we could kiss but I’m afraid he won’t cause he has a “gf”. It makes me frustrated cause it’s just acting. I want him to be comfortable with the idea though. How should I approach this? Is this okay? I feel like this will make things more comfortable and more believable. I would really like to kiss him if he’s okay with it. Is it worth asking?

Ask for a stage kiss with consent
Don’t ask to stage kiss
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Can I stage kiss a guy in a musical even though he has a girlfriend?
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