It worked for me! It started 'intensely' because the minute we read each other's profile and talked, we knew we would, at least, get along brilliantly as friends. We send each other's long emails from the start and talked on the phone for at least an hour every few days. Texted daily if I remember correctly.
The difference is that he asked to meet up right away. Due to circumstances, it didn't happen for a couple of weeks. I was anxious about it as didn't like his picture. As it is, the moment I saw you I found him attractive. We had a great time and I fell in love there and then and as it happened so did he. I emailed a friend and said I'd found the man I would marry.
A month later we were a couple, declaring our love, going away together and it felt like we'd always known each other. We talked of moving in together 3 months after we met, however, we know we needed to slow down a bit at this time, so it took almost a year. 3 years later, we were married and we've just celebrated our 10 years together!
The irony is that he isn't, and nor am I, impulsive people at all, on the opposite. This intense and quick relationship was totally out of character, but it happened because somehow, both of us just knew it was right.
My advice is: be yourself. Don't scale down because you feel it should. What you need to do is accept that you can only control your own feelings and wishes. His might be the same than yours, but maybe it suddenly won't. Then there are all the circumstances that get in the way. The first months of an intense relationship are scary because you keep expecting something to get in the way, and often it does, but sometimes you get lucky.
My attitude was, it felt good, so I was going to enjoy it and if it went wrong and I got hurt, at least I'd had moments of pure happiness.