Manor level upgrade problem

Vangel

I'm assuming skill points are OK (Gather / Combat / Craft). It looks like you just need to gain more intimacy points but I'm only guessing.
You can get these through different interactions and team-ups. I found this from Reddit:

Miska University. 300+
Any and all resource point. 300+
Resource point/missions. Small amount.
Taking care of farm.10+
Eating food from their table. 10+
Gifting them flowers. Different flowers varies in amount. 15-666

My advice is to try this and see if the Intimacy Points change at all.
I'm only having a guess here since I haven't collaborated my manor yet.