I need relationship advice?

Okay, so i know this is a lot to read, but you need to whole story to be able to help. I really liked this guy for a while, and he liked me too. The other day we were at a local park and were just sitting around goofing off, and we had been flirting back and forth for a while, so finally i just kissed him. It was just a little peck, and i didn't think it'd turn into anything major. Later that evening we kissed some more, made out a bit, but at the end of the night decided that we were just gonna be friends for now, even though he really wanted to date. I just didn't want that right now. That was on a Thursday, and then the following Saturday, a bunch of our friends and us went to the same park to watch fireworks for an early 4th of July type thing. Eventually it was just me and him, sitting there talking and waiting on the fireworks to start. We kissed some more, and it went further than I've ever been before (still just kissing, just making out more...heavily, i guess). The next day (today) I told him that i really like him, and that i do want to date him eventually, but i just want to stay single for the summer. I didn't wanna lead him on anymore than i already have, and i feel really bad about that. Everything was just moving too fast for me. We went from being kinda good friends, to making out in a span of 3 days. I want to be friends with a guy, go out on actual dates, and then maybe date them. I really like this guy, and I don't wanna mess things up anymore than I already have. Did I do the right thing by telling him that i don't want to date him after all that, or should i have dated him because of the stuff we had already done? His friends have already called me an idiot, and told me i shouldn't have done what i did yesterday if i felt that way about things. I know that, and I already feel bad about it. I just need an outsiders honest opinion.