Best Friends' Sweet Escape

The day starts with you coming over to Mackenzie's place as you usually do, with board games and movies to entertain yourselves as best friends would. As the day continues, you see an opportunity to subtly express your deeper feelings. Maybe it's during a close win in the board game or during an emotional scene in the movie. From there, the air is filled with uncertainty and desire leading to a tender moment and the beautiful crossing over from being best friends to being lovers.
Choose a movie she loves or find one that has a plot of best friends turning into lovers. As you watch the movie, sit very close to her. Let your fingers brush against hers and let your shoulders touch. Make sure the atmosphere is cozy with dimmed lights and comfortable blankets. As the movie reaches the point where friends start realizing their feelings for each other, use this as a cue to confess your feelings. Assure her that your friendship is the foundation of these newfound feelings and not the opposite.
You can then proceed further to kiss or more sensual activities. Be aware to constantly assess how comfortable she is. The main point here is that this date is not about getting physical, it's about making her feel special.

Firstly, find a movie that has a plot of best friends turning into lovers. You can find several movie options online. Make sure the movie ends on a positive note.
Set up the room to create a cozy atmosphere. You can use dim lights or fairy lights to soften the mood. Have a comfortable space prepared with blankets and pillows. Make sure there is enough space for the two of you to sit close together, but there should also be enough room for you to make subtle physical contact like brushing your fingers, touching your shoulders, etc.
Bring board games or any other games she likes. It could serve as an ice breaker and help you two relax.

Don't rush the transition from friends to lovers. Take your time in expressing your feelings and be sensitive to her reactions to avoid killing the vibes.
Keep the mood light and fun. Make sure the transition from just hanging out and gaming to a more intimate atmosphere feels natural.
Always ask for her consent. Especially when you cross boundaries from being friends to being more intimate.