I'm impressed, that must have been some kissing!
Ever heard of dating?
Try it with this person, go out on dates, a few of them, 5,6, 10, etc. and date for a while. Do stuff together, hang out, space it out so you see either maybe once or twice a week, keep your life as is, don't rush into the committment, keep it fun and continue to throw in some of that kissing that was mentioned earlier, heck even try it without being drunk!
If after several dates, you still enjoy each other's company without feeling "odd", try dating exclusively (aka don't date & kiss other people) and see what that kind of mini-committment feels like. If you like it, proceed to your bf/gf relationship and take it from there.
My advice is don't rush the relationship, enjoy the process of creating the relationship - it is very fun!!!
Good Luck!!!