saying I love you

How long were you in a relationship before saying I love you,who said it first? I have struggled with letting walls down in relationships and have only told 1 man I love him. I was single for 5 years and this relationship I am in now I've told him all of that and one day he said its okay to let my wall down .... I have and I swear everytime I see him I get deeper and deeper feelings,Only thing is I struggle expressing myself and scared to say I love you first lol. tell me yalls stories,maybe it'll help me build confidence