My friend is ghosting me?

Let’s call her Jenny. I am friend with her for 15 years. Both of us are going to different universities, but we still managed to meet at least once a month. This year she got into her first serious relationship. At the beginning of her relationship we were seeing each other regularly. I even met her boyfriend and he seemed fine. In like April communication from her side slowed down. I thought she is just in her honeymoon phase and also exam season was on the corner. So I gave her space. Three weeks ago she reached me out with a message: ,,Sorry, I didn’t contact you for a such long time, are you free next week?‘‘ The next week she cancelled because of family party, so I suggested this week. Last night I texted her, if she is still up for our plan and she left me on read? I don't think I did anything wrong. Also I am a female.