First I agree with the previous posters, a boyfriend being that jealous about someone from your past doesn't deserve your love!
And I also like to say that in a way you're right, birthdays aren't always that special. Don't make it a bigger thing than it is! Sometimes birthdays are a blast, with lots of fun, laughter and happiness... and sometimes they just suck. My husband's birthday last year was a great party with his family and our friends who all came to visit. This year his birthday was just not so good... *understatement*... All our friends and family are far away now that we've moved to Spain, and we had a lot of stress to deal with so we took it out on each other and that way his birthday was nothing but a disappointment. (My own birthdays are never special... I still have a problem celebrating them other than having a dinner and a glass of wine with hubby).
So like I said, birthdays can be a joy, but don't get your expectations up too high or you'll be disappointed.
And you know what? Before you know it another year has passed... time for another birthday