Hi Lori,
Welcome!
Most of us here arent dealing with widowers....but there have been some in that situation posting on here...hopefully they are lurking and will speak up with advice as well... (One whose name I can remember was "sandy beaches" or something similar....you could scroll back for posts with that name on them for starters).
ANYHOW...
Short answer: I agree with Pam....I see no reason for you not to be at these events.
Longer ramblings:
Not sure how long you've been together, ...but you state "very serious".
IMO, this would translate into "future wife".....and, IMO, a wife would be at his side supporting him in supporting his children in their memorial to their mother.
Hence....(the agreement with Pam)....there is no reason for you not to be with him at these events.
One thought.....does he think it would be awkward for YOU to be at an event that is , basically, focused on his previous wife? So, he's trying to be "respectful" to you by not asking/expecting you to attend? (men often dont like to "talk" about this stuff...easier to just make decisons--(e.g, dont invite)--and actions--(go to it without you)--then "talk" about it all...
AS for his remark re:
He has told me he doesn't want all of these things but the friends do and he doesn't want to say anything.
The golf and 5K event ....I"m assuming these are "fundraisers" (e.g. for breast cancer research or something?) that are done in her name/memory.
The other birthday/anniversary I'm assuming are a more personal thing with his kids?
I guess if he wants to do some small personal thing with just his kids on their moms birthday/anniversary of death...I'd let it be and stay out of it unless invited....because, yes, you didnt even know her, etc. ANd I'm considering this event to be (at MOST) a quiet lunch together with his kids and sharing some rememberances of mom, perhaps a walk to the cemetary. done.
Re: the fundraising events...IMO, if he is thinking of /planning on /marrying you.....you need to be with him at these events......I mean....no one (and I would include his former wife here) *expects* him to remain a widower for the rest of his life on earth....and, hence, ...they would CELEBRATE him finding a new supportive partner......and, yes,....you would be his support person at his side at such an event.........and , honestly, it's doing YOU a disservice to NOT invite you.....causing you to *appear* not wanting to be there/supportive!
Also....not sure how much volunteer work you have time for/are interested in.....but , if you are at all inclined...I think it would be awesome if you were (somewhat...as your time/interests allow) active in fundraising for these very same events.....how much more can you show support of his kids than to actively promote the "causes" that are honoring their deceased mother.
PS:
Their anniversary is now coming up and I know the phone calls will start from friends. When does it stop so that you can move on? '
are these "friends" even aware he has a "serious" partner these days? ARe they aware he's not sitting around 24/7 pining for his loss of 4 years ago? PErhaps some sort of public "engagement" announcement is in order here!.....?
I mean...this sounds like friends calling to console a poor , lonesome, grieving, unhappy old man......when , in fact, he has a LIFE to live and celebrate......and they should (if such supportive friends of his)......be wanting to celebrate his life with you.....!
AGain....best wishes! Hope some others with widow/widower situations join in!
(PS: my mom died when I was young....there was NEVER any acknowledgement of her birthday/death/etc after the funeral. I can see since the kids were older how this might be more relevent.....but,...it's certainly not a "required" practice....)