One-sided friendship (24F)

I've been best friends with this girl for over six years now. Over the past year and a half, things have been changing. She got into a relationship. Now, we both said, no matter the circumstances, we'd always work around our busy schedules. Even my boyfriend and I have the understanding to make time for our friends. I understand that we have jobs and lives, but I also know you prioritize who you care for. So, I feel like I'm in a one-sided friendship. I've been putting in all the effort for a while now. I am always the first to set up plans, text first, and even call first. It's mentally exhausting.

I explained to her how I felt, and she apologized. Her explanation pertained to her boyfriend. He's a bit controlling. Since they got into a relationship, he's pulled her away from her family and friends, and it's hard for me to stay in touch like we used to. He's over her house every day, or it's the other way around. I was canceled on probably four or five times last month due to the arguments she's been having with him. Every time I try to bring that discussion up, she constantly makes excuses and says she'll try better, that our friendship means the world to her. I haven't seen any improvement. So, I wanted to know if she would take the initiative to text or call me first for once; we went maybe a month or two without speaking. After two months, she slid up on a post I made on social media, saying she missed me and wanted to hang out. Giving the benefit of the doubt, I agreed. That day came, and within the hour of our girl's night out, she canceled and said she got in a massive disagreement with her boyfriend and wanted to work things out with him. Sorry for canceling last minute. I turned my car around and went to another friend's house the same day.

I was over it. I didn't respond to any texts or calls for that week. After assessing the situation, I finally answered and told her it was not right that I kept getting canceled on and how I felt. So, we made a day to hang out, and when we did, she was basically on the phone with him or texted him while we hung out. More recently, it's been the same pattern. Since our hang out last week, I told her I needed to talk to her about one of our mutual friends. It was important, and we needed time to talk. The past couple of days, it's been sure! I got you! We'll talk soon. I feel like it's too late. I feel like I'm unheard at this point. I don't even know if our friendship is worth saving.