Scared of Heights?

Years ago I had a go at rock climbing and it was a disaster - 2ft off the ground I decided I was scared of heights and that was the end of it. Over the years I've done things to prove that my fear of heights isn't really that bad - but I've never since climbed until today. Friends decided to take blue monkey to a climbing centre as a birthday treat. He was a natural - although as usual his attention span is short - but he got up the wall a few times. I decided to have a go as well - and as I refuse to show I'm scared infront of the monkeys I knew I had to get to the top at least once - but I loved it, at points I'd glance down and think ohhh that's high but then carry on. I admit we were on the smaller of the walls - but they were still 30ft so if we'd have fallen it would have hurt. I can't wait to go again - not sure if I'd trust myself with the knots but I would love another go.