The appropriate time for dating
It takes time for people to get to know each other.
Because of your marital status and the complications of divorce, dating during separation is tricky, especially if your separation occurred recently.
Be honest and let them process the information however they need to. Especially if the two of you are in what you believe to be a serious (or heading that way) relationship. We all carry baggage, and sometimes that baggage slows us down.
If your partner really loves you, he or she not going anywhere. You are both intimate, you want to spend time with each other, and you're both very interested. Sometimes we want to be in love but aren't yet allowing ourselves.
But as long as you explain that it doesn't mean that you never will love him or her, things will be okay.
Just don't say “thank you.” That's a bit fucked up. I believe most of us understand this, but when we find ourselves in love, we quickly move to convince ourselves that such a love must be reciprocated.