How Do I Tell My Girl That Id like to see more effort in our relationship without sounding sensitive/bitchy. M[16] F[16]

This girl and I don’t have a title on each other but we interact as if we are in a relationship. I always have fun around her and she says she has fun around me too and likes me but she never initiates anything except texts, and that’s after I don’t text her for a couple days. She says she has problems being affectionate due to personal problems, but she has made some effort to be more affectionate (hugs, physical contact, and wanted to kiss me, etc.) but I don’t feel like she puts in any other effort into what we have. For example, she reminded me that we were gonna meet up at the bus station the next morning and I agreed. I get there the certain time we agreed on and 8 min later she’s not there, and I can’t afford to lose multiple buses so I just text her let’s meet up at a certain stop. We do so and she has to rush to get to her class and we just go our separate ways. I text her hey let’s meet up to go home together and she agreed. After waiting 15 min I see her as a bus pulls up, but she then sees her friend that is making motions to my girl come with her, while my girl tells her to come. My girl gives up, goes with her friend and texts “come with me to ___. Plz.” A little disappointed, I respond nah and go home before my parents chew my ass out and I confront her about it over text. She apologizes profusely and says that she never intended to slight me and it wasn’t intentional but a spur of the moment and that she comes from her sport that period and is tired so she walks slow. In the end, I see absolutely no qualms with this and reconcile with her, and we’re good. However I still felt slighted as I ended up waiting about 15-20min for her for absolutely nothing and I already annoyed by the fact I have to initiate almost all meet ups/dates. Am I expecting too much,being over-sensitive, or just what? And how to do I express this to her without sounding sensitive. I don’t want to send a text saying “I always initiate everything. Start initiating more meet ups/dates.” As it sounds like a bitch 🤣.