Don't know about per level, but helpful and a duration of days is reasonable. Not sure about the mechanics of making someone fall in love, but helpful seems a good way to put things.
Helpful and 2d6 days sounds good.
I thought the charm bit we were discussing was a replacment for fascinate?!?
For the blessing/curse, I'd prefer to simplify it to bestow curse and a positive equivalent for the blessing (like a +6 increase to an ability score or a +4 bonus on attack rolls, saves, ability checks, and skill checks).