Most Helpful Guy
Most Helpful Girl
... I have ignored the emails he's sent me for months...
Although with you being in a 'Relationship currently' here, dear, with you not being able to 'Stop thinking about him,' it would seem you may Not be totally contented in your relationship at hand with this man. Perhaps you got into it too quickly and now, even after the split, you are finding you can't seem to forget About... The other half.
Your closure very may well be in this 'Happy birthday message,' and by sending it, you may find out more than you Wished for or Even.. Hoped for. He may respond to where he wants to meet up so be prepared that it could be a Surprise to your eyes that you are Not ready for or may have expected.
However, you could push a button also in another way that may save your day, just food for thought. Tell him happy Birthday and that you are doing fine, you have someone special and you wish him well.
It's your call, your choice if you want to say Anything of this nature. But with 'I miss him,' as the old saying goes and still Does: Be careful for what you wish for.
Good luck. xx