Ex (22F) didn’t text me (23F) Happy birthday…

Needing some advice…. It’s kinda corny and silly but it’s my truth.

Me (23F) and my ex girlfriend (22F) broke up four months ago. My birthday was 2 days ago, and she didn’t text me happy birthday…. Hers is in about a week. I had wanted to text her happy birthday, but now that she didn’t text me, I’m unsure.

For more context: we broke up on good terms, no big fight or serious wrong done. We had dated for a year snd a half, plus some chance if you count when we met and started “talking.” We were long distance and as it came down to ending long distance, we couldn’t agree on where we wanted to live or move next. That being said, good terms still hurts and I deeply loved her (still do in a sense, I always will). It was painful as fuck. We ended things saying we wanted to try and be friends, but have had no contact since then. Especially being long distance, I mean NONE! We still follow one and other on social media, but no texting no calling nada. I miss her a lot … I was not the biggest fan of the idea of being friends with your ex. But not having loved someone so deeply and became such close friends, I do… I want to have some sort of friendship / relationship with her… but I’m not sure how. I thought she’d text my happy birthday and idk maybe I could figure it out then. I guess also to clarify… I don’t want to be back with her. I kind of initiated the break up. I think we were both too young to be changing entire life dreams and goals for others. I still loved her, but I couldn’t do that and didn’t want to ask her to either.

The long story short is I’m hurt and now not sure if I should text her. I’m now second guessing if things did end on “good” terms, if she meant what she said abt remaining friends. And it’s making me second guess if I should reach out to her. Do you think her not texting is her setting a boundary? Is it crossing a line to text her considering she didn’t text me? Is texting her a lack of self respect?!! Like before my birthday came and passed, I was about to mail the woman a HAND MADE CARD. I am a lesbian by nature and it’s in my blood to yearn. What is a girl to do….