What should I do about this situation?

Hey everyone. Hope you are doing well. So, I am an actress, and as a part of a romantic series, I have been asked to perform a make out scene. I am a 26 y/o blonde, and my co-actor is a 30 y/o guy from the Caribbean. My boyfriend has always been a pillar of support, but he is seemingly worried about my first make out scene since I am a relative newcomer, and is unhappy about me having to practice the kiss with the co-actor a few times as required by the director. I tried to convince him that it's only a scene.

The director showed us two actors this scene to recreate the angle and the lighting-

What should I do about this situation?

When I asked my boyfriend about his opinion, I could see him a bit unhappy. The co-actor is decent enough, but during one practice session, I felt he wanted to eat me out rather than just act. Should I be worried? My final shoot is tomorrow.

What should I do about this situation?
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