After a 2 Year Relationship Ends, is it wrong to throw everything away?

It’s just “one of those things”. When I met her she was a very defensive person, always trying not to upset people at the cost of her own discomfort. In our time together, she told me I have built up her confidence in herself so much that she feels ready to “at last” try to undertake a personal journey to connect with herself.

She’s had a tough life, tougher than most would know… and having been at the point she’s at now in the past, I understand how important it is to one’s life. The fact she felt she had to go alone to do it really drove home the point how much self-discovery means to her right now.

All I could do was clear any dirty laundry we had between us, say goodbye, and wish her good luck.

—-AND NOW THE QUESTION—-
My usual way of getting over someone in the past has been to take everything they’ve given me, all pictures of us together and throw it all out. Act as if it never happened: But those relationships ended with them cheating on me, or being very misleading to the point of damaging my heart/mind/soul… this time? That’s not the case. A month ago we were talking about moving in together, getting promise rings, I was ready to make the jump for real… we have so much fun together, and so many things we did in our day-to-day reminded us of one another… even my family warmly welcomed and accepted her and us as an item: Something they were kind of skeptical of with other girls came easily for her.

I have our stuff in a small bin right now: Birthday cards, anniversary cards, photos, and perhaps most notably, a photo cube she made of us for Christmas: Inside containing hundreds of movie ticket stubs that we’ve seen together, going all the way back to our first movie… a midnight screening of Grindhouse.

I want to get rid of it so I can sleep again, so my stomach will stop bubbling, so I can eat something, but every time I lean in to grab the bag and take it to the big trash can, my hand locks, I begin to cry and I lay down and want to call her, e-mail her, beg her to come back: But that’s unfair to her and her goals in life right now… it would be selfish, and I know that.

She said that “she won’t throw anything away”... but does that make it “okay” if I do? I almost convinced myself to do it by saying “and should she come back someday, we can simply start over again.”