My (19M) gf (19F) doesn’t seem to love me anymore but everything’s been perfect until the last 2 weeks. Please send help!

Hi all,
my girlfriend and I have been pleasant together for 6 months (known each other for 3 years), until two weeks ago at a party, where I felt ignored and decided to leave (I felt unneeded and I calmly told her that I didn’t want to get in the way of her and her girls talking, I said i felt bored being there alone bc I didn’t know anyone).The days prior however were the best days of our relationship (highest point, reaching new levels of intimacy).

This became a huge misunderstanding, since I felt hurt but she thought I wanted out, which I clearly didn’t. Her friends questioned my actions and asked her a few things. However, the same week a few days later she had a MAJOR fight with her parents. Her home life has never been good, and has always ignored or tried to avoid her controlling and strict parents. Apparently she told me it’d be “hard to hang out”, which I don’t know if that’s an excuse or not. She revealed to me some ugly personal details about her parents in a long rant.

Now shes been less touchy (barely any), less flirty, was texting less until a few days ago, where we started texting lots again. She used take hours to reply for a solid week, until a few days ago.

However, she doesn’t try to make efforts in seeing me anymore. I feel like she’s losing feelings over that. There’s no more flirts, more formalish texts. She’s always packing her weekends up and she has no time in the week due to work. We’ve communicated and it seems that she’s finding small reasons to be mad about me. although, for the first time we were communicating thoroughly about our thoughts.

She apologized and did see a bit from my perspective, and so did I. I was calm throughout to cater to her if she has had a rough week. She asked me about our potential long distance relationship starting September, which surprised me. I thought it was over for a while. She’s unsure about how it’d work, but when asked she said she would like it to work if there’s a way.

I’m not understanding if she wants it to end already to rip off the bandaid or a genuine question of how it would work.

I called her a few days ago, she didn’t even address it, unlike 3-4 days ago where she said “I saw you called, I have a few minutes”. I asked her to call me when she’s free and she said she would, but never did. I tried seeing her on lunch break but she said she had plans (maybe to avoid me?), and I gave her space and didn’t text for a day. This made us go back into that dry texting style, one to two word replies, no new content added in the conversation. The next day, even while not being let out by her parents, she “snuck out” to go to a friend’s party 40mins in a different city.

It’s eating me up inside. I know some will say break up, which is true, but I think I should give it a try first. I don’t want our first issue to cause an end to a good relationship. I haven’t seen her since last week.

I feel like she’s either losing feelings because of that misunderstanding between us, someone else (timeframe might make it questionable), friends saying stuff to her, her mental health from home issues. This all went from perfect to the best part of our relationship to downhill in 3 days. Now it’s been two weeks of this state.

How do I get her back into our groove? Two weeks ago we were at the best point of our relationship, and the most intimate. We spent hours together online, phone, or in person. I want to reignite the spark so it was as strong as before.

I don’t know how relevant this is, but she’s currently in her luteal phase. She’s told me in the past that it’s the worst time and not fun for her. But in the past she has never resented me like this, but has been dry on text for two days around this time last month.

Please, right now I’m looking for anything I can do to rekindle the relationship. I want to give my best effort and if that doesn’t work, I’ll break up (right now it’s in a slow fade/cold violence phase).

TL;DR: gf and i were perfect, climax in the relationship for intimacy. at a party we have a small issue and we’ve communicated once about it. she then has major fight with controlling parents who don’t let her date (she can’t move out). for 2 weeks she’s been only working, hanging out with friends for one birthday party and getting quick drinks. less than 2 weeks ago sent flirty texts, last week hung out with me, less intimacy, no more flirty texts, called last week, tried to resolve issues.
then didn’t want to call anymore starting 2 days ago. unknown issue is causing her to slow fade and go distant, i don’t want our first issue to ruin the relationship, please help me rekindle this!

What can I say to her?

P.S. i know in most cases people let it go but i figure it’s worth at least trying before giving up on something that was perfect.