Can you give me some advice or your opinion about my relationship situation?

I've been dating my girlfriend for about 6 months now. We're both 18 and i really really care about this girl. I remember having a discussion with her towards the beginning of our relationship about how some of our friends who were only going out for a short period of time we're saying i love you to each other and how we both thought it was so meaningless. Recently in my relationship my girlfriend has been saying things to me like ';my feeling have grown for you so much i can't even describe how you make me feel'; and i'm thinking it might be the right time to tell her i love you, but what do you think?

mask making