Well if it's pacing you wanna fix you always have to consider the writing like food your feeding to someone. You have to satisfy some hungers with either something of greet quantity and good value, or something of small quantity and great value. It's very tricky to do this and as long as you understand what your characters would do in each situation, where the story is going, and how this can all stay glued together in the mean time, you could maybe make a good story.
As it stands, every small event you put in front of readers just feels like you're too afraid or too inexperienced to venture into each action. The romance feels like an awkward dance that somehow gets connected cause two people really wanted a kiss.
The ex drama feels odd since you keep introducing Renee's ex into the story like either someone we need to hate but can't get rid of, or some odd problem that makes us sick.(why did she pass out?) It seemed like Renee and Jason had an awkward relationship as well and he cheated cause of that. This is probably not why he cheated but that's what i'm feeling.
Her friend either has no time on her hands or she's living vicariously through Renee cause her help feels like a friendship based on obsession. Her actions were just to help the main character and nothing else.
The comedy feels off like adult speech in a kids show format. Which brings up the dialogue as a whole. If it's meant to accent the comedy, you need comedy.
And that archery scene didn't make sense to me cause the rules of the game kept throwing me off. First, if the loser is making breakfast or lunch, shouldn't the winner get a free meal? Seemed like a bizarre way to add more bonding time between Renee and Trevor. And the winner of the game was determined by questions, not the archery. So what was the point of the archery. I get you could get people bonded over similar hobbies, but if I like racing cars with someone and the only way i can cross the finish line is if i win some trivia during the race, i'd be confused.
Hospital scene was bizarre in it's circumstance. Don't know why Renee passed out. If it was really cause Jason causes her to feel so much stress to the point of unconsciousness, i'd say she either isn't over him or she's a lightweight. Either one could be understandable if we knew more about their relationship other than the breakup.
And the birthday scene was uneventful, regardless of how you described it. If you were going for a "will they, won't they", it didn't go anywhere cause it was obvious they would be together. Not cause it's a trope, but because there was nothing keeping them apart. Not even Jason. And coming from what I told you above, that doesn't make sense. Unless this is one of Renee's flaws.
All these moments needed not only something more, but something less awkward. It's like when you go for a driving test but you're going slow and still somehow swerving.