Late period

Maddison • Taken by my amazing man 06.01.2014💏 also a full time waitress and college student ☕️💻
So my boyfriend comes home tonight from his 18 day holiday, and my period is 6 days late now and k don't know whether to tell him or not, I'm scared of what he will think! 
Like I always know I can talk to him about everything but I don't know if I should just wait to see if I know if I could be pregnant, or find out together? Please help lady's.