It depends on a few things, like how long ago you broke up, how you broke up, and if you still talk. If you broke up recently in an amicable way and don't fight when you talk, and still do in fact talk (even if its somewhat rarely), I think its perfectly acceptable to wish your ex a happy birthday. It's not pathetic or desperate as a relationship is a big part of your life and the people you have relationships with seem to have to go from being a part of your everyday life to nothing in what seems like no time at all. It makes sense you are thinking about them on their birthday. I'd say its best to keep it simple and make the conversation about them and what they're doing with their life, as you would likely do for any friend on their birthday, and of course steer clear of the past or potentially touchy topics of conversation. I'd also say a happy birthday text or email is entirely appropriate.
- Response by bluebutton32
, A Hippie Chick, Female, 26-28, Student