How early is too early to say "I love you"?

Abbie • ( ͡° ͜ʖ ͡°)
I swear everyone has a different thought about this! My boyfriend told me he loved me 3 weeks in and I honestly felt the same (and still do, 2 months later).. He wasn't scared to say it so soon and I'm rly glad he did ^^
From the outside, 3 weeks seems pretty damn early to say the big I love you, and I know a lot of people freak out if their so says it too soon. What do y'all think?