Do you think its possable to fined ''the one'' at a young age?

Im 18(turning19), and my boyfriend is 20(21 in september) and w have been together for 3 years, well, it was 3 years in may. I was just curious about what people think about young love and such. I have a promise ring and just do you think it is wrong to get engaged at a decently young age..like possibly 2 years at most? because that would be 5 years, or should we wait longer? We have had conversations about this. And their are a lot of people looking down on young love and assuming we aren't ready or smart, so it's quite a controversy.