I (19M) am confused in my relationship with my gf (19F), and Im wondering if we need to break up?

For context, this is my first relationship, we're both in the same college and thats how it started. she confessed to me, and id had a crush on her for a while, apparently she did too. now that was around the end of the second semester of college.

During that time, for like 2 months, everything was perfect, shed be really happy to see me, and wed talk for hours.

now ik, ik it was the "honeymoon phase" but now, it just feels so different. she barely looks up when she sees me, tho wed not seen each other for a while, theres very little reciprocity, and it just feels so off. and thats been the case for months. but i am an overthinker, so i just told myself id think about all that during the summer break, instead of overthinking and messing up my grades. so i did, and its the summer.

we still text everyday, but its so dry, and boring, almost as if shes been forced to text me. I send her cute stuff, she reacts heart to it and doesnt say anything further.

i had a date idea, but she kinda shot it down saying the places i wanted to go were far away, and its hot, but then she didnt suggest anything, the convo just ended there.

the problem is, since it is my first relationship, i dont have a bar to compare it to, so idk if thats how all relationships turn out after the honeymoon period. Its to the point where i kinda feel like shes not even the person i started dating.

Now i really love her, and if i werent interested anymore, i would break up, but since i have no idea, and i dont even know if shes lost interest im not sure what to do...

im thinking the best thing i can do is just talk to her, and we are meeting in a couple of days(not like a date) so i could talk to her but im not sure what to say to not make it awkward. i feel like she'll just say that she hadnt even noticed anything going wrong. i really need some help here