Girlfriends dad found out about our ting!? Help!!?

So I am 13, and my girlfriends is 14. So we were talking about and if we wanna have it last night (any answers like "your not ready for " will be deleted." when I sent her a ually explicit text, and I got no reply, I went to sleep. When I woke up, my phone had received a message from her dad reading "So Alex... I will be contacting your parents when you get back to Washington about these texts". Now I'm scared shitless. Like when my mom finds out, I'm just gonna dash out my front door and go into the gulch because I will be to embarred to face her. Now I feel like I will never be able to see her again, but I love her and we both know we can't lose eachother. What should I do? I just wanna spend the rest of my life with this girl, but know I feel that I can't. PLEASE ANSWER!!!