The couple have been dating since May and have been spotted getting cozy across the US and even overseas after they celebrated her birthday together in Italy.
Now Simpson has admitted, if the relationship seems like it's getting serious, that's because it is and revealed they are already planning on spending Thanksgiving together in November.
She told People.com: 'As far as Eric and I go, we're just best friends. He's my dude! I love him.
'For Thanksgiving, we're all gonna be in New York. I'm gonna be on a Macy's parade float.
'It's not always the best way to spend a Thanksgiving but it's a great way to celebrate. So, maybe I'll just have all families on the float.'
For now, Simpson says she and her man are simply enjoying spending time together.
She added: 'Tomorrow we're having a long day off. He loves art. So, we go to art galleries, and he loves photography. It's cool.
'This relationship is just normal, thank God. He's very, very supportive. I couldn't ask for a better man in my life right now.
'He's the one for me right now! I'm very happy, I'm in a great place and if right now could last forever, I'd take it.'