Slow down, take a deep breath
You really need to chill - it sounds like you have an awful lot going on in your life, lots of stress etc. Its all mounting up so high that everything is starting to get to you. This is why everything seems so hard & confusing. You need to deal with one issue at a time and put things in perspective. I have been in your position and I know exactly how you feel. You really need to take some time out for yourself - all this worry and stress will only make you ill as it did me once upon a time. I was very ill all through stress. You need to relax more. Have a nice long hot bubble bath later; even put some chilled out background music on and unwind it works for me every time.
I would love to call this exgirlfriend about the note, and then call her husband. But do I look like a fool then? I know it would make me feel better, but my fiance will probably be like, "oh you dont trust me you can't get over this."
Don't do this - this will only make things 100 time worse and you will only regret it. You need to think about things like this before you act upon them. You are only going to piss your boyfriend off and what's more you will stir up trouble between his ex and her husband - this will only come back on you and in the end you could be seen as a bit of a trouble maker.
Or his ex could be doing this just to get at you and winde you up (Yes people can be really cruel) if you rise to this she will have a laugh at your expense and know she has the power to do anything - this will only lead to you and you boyfriend spliting up. That's the danger when others start medling in your lives - but the trick is to sit back and say to yourself - I am not bothered, me and my man are happy and solid as a rock nothng will come between us and just ignore it. I personally know that nothing or none could ever come between Pete and I. If people want to medal in my life, they can go right ahead and try - they obviously have too much time on their hands and nothing better to do. If anyone ever did come between Pete and I then we were obviously not meant to be in the first place.
All of his ex girlfriends are/were trash. He'll admit that. But then why does he feel the need to keep pictures of them? Christmas Cards from them? Is he that hesitant to through away remnants of his wild past?
One of my ex's was a total areshole. He ripped my heart out and stamped on it 100 times over - but even with that he was still a part of my life once and we did have some good times in the beginning. I still have pictures of him and presents that he once gave me. I keep them in a box. I will never throw them away! It's not because I miss him and want him back but purely because I don't want to forget. My ex (in a funny kind of way) has had a great impact on my life and having been through the hardship it has done me the world of good. I have become a really strong person, I can spot arseholes a mile off and I can get through almost anything on my own.
I have laid all of the horrible things that happened to me in my past to rest - However I have chosen to hold on to fond memories and that is something no one can ever take away from me. I can also reflect on how I thought I loved my ex, but he had to break my heart for me to discover what true love really is. (Lucky for me that is happening) It's not about rubbing it in my partners face or holding on to something that might be again it's about me!
I have grown as a person and if it had not been for him coming into my life and doing all those things then I would not be any wiser than I was at 18yrs old. I would not be so lucky to have all the things that I do have now. I have self respect, self worth and above all I am really happy - but it took pain and heartache to get me here, to truly understand.
Everyone has their own personal reasons for keeping keepsakes from past relationships. Your boyfriend is not trying to rub it in your face at all.
There is always a valid explanation to things like this! You really need to let this anger go - it really is not the way to deal with a situation like this. Plus you have to accept him for who he is and his friends are a part of that. It's all about making sacrifices and compromises. I get on like a house on fire with my boyfriends mates (I am quite the social butterfly though) but there are one or two I dislike, my boyfriend knows this, but he also knows I am willing to dine in their company for him and I am not going to make an issue about it.
I hope all of that makes sense.