Excellent. We need the cases though to back up our findings. A case database can be right here on the wiki, but it needs work to bring the study in a compatible and searchable format.
Mononucleosis as being related to the Epstein-Barr virus (like herpes), is not only connected to the spleen but usually to lymph nodes and possibly to the branchial arches, so it's interesting to compare. The spleen is constructed like a big lymph node.

Yet, I find "unconditional love" to be too unspecificly put as biological theme. Actually, any conflict could be put under that headline.
What emotion would be connected, which thoughts triggered by it? 
I think it might come down to a lack of support or supply felt, but being a medulla-related tissue this would be an aspect of "not being worth it". Blood has to do with identity, family, roots, the spleen has also to do with own resources, being a reservoir of blood. So, one confirmed theme is "Self devaluation concerning healing and integrity "
How does this relate?