Thanks mate, I appreciate it. The relationship is a awkward one, as we were previously really good friends before we started dating so I don’t want to be too heavy handed, but I also can’t really go on feeling like I’m a chore to herHappy birthday for Tuesday, mate!
Spending time with friends and family sounds like a great idea. It's easy and understandable to get yourself down thinking about who isn't here to celebrate these landmark days with you, but when you can remind yourself who IS there and get lost in their company for a little while it can make things that little bit easier for you.
As for the relationship issue, I'm no expert on such matters but it sounds like the only real solution there - however awkward it may feel - is to talk to them.
Good luck with it all and enjoy your day!