Hey SecondHalf
Keep up the good work and stay NC. It's tough, but you'll feel much, MUCH better if you adhere to it - I promise. If you break it, you'll feel worse.
A couple of girls in my past through me for a loop and broke my heart, but I was weak and AFC and let myself slip into a mode I shouldn't have.
Same deal as you - the birthday rolled around. Big day, right? And I had the same thought - "should I send her flowers?"
Let me tell you, as someone emotionally sober, how stupid that sounds.
"Should I send her a card?"
Well you know what I did? I bought a card and wrote something. I put it aside. I had the envelope and stamp ready to go. I looked at it again with fresh eyes, tore it up, and threw it away.
Another girl, I resisted contacting (texting was more prevalent by then). A text seems so simple - what's the harm? I knew deep down she was probably expecting some kind of happy birthday message. I found things to do all day - distracted myself. Got through the day and it felt pretty f'ing good, let me tell you. If I thought about her at all, I just imagined her staring at the phone, desperate for my acknowledgment of her existence, and the absence of that acknowledgment completely ruining her birthday. I know that probably wasn't the case, but you're allowed to fantasize.
As backbreaker said, it IS like a drug. You send a text or email and it feels good for a few seconds....then the low feels lower than the highs ever did. Your "highs" will actually feel like diminishing returns - they'll feel worse than any real high you had when things were going well. The lows - "why did I send that text?? I'm an idiot, I feel worse" - they set you back a week.
Do keep in mind that there will come a time, if you've been successfully silent, that your ex will sniff around and wonder if you're alive. Usually it comes just when you're feeling 75% better and really moving on. She'll send a seemingly innocent "hi" or something stupid like that. It's bait - don't take it. She retains some guilt and wants to know that you don't hate her. OR, she wants to know that you're pining for her and not out living your life happily without her. Don't give her the satisfaction. She dropped you - let her wonder for the rest of her life what kind of mistake she made. If you contact her, you'll only confirm for her that she left you for good reason, while simultaneously letting her know that she's forgiven.
Remember, your #1 weapon with any woman is your attention, or lack thereof. Silence is golden. Stay NC - stay strong.