Gloom With A View

I'm a 30-year-old woman in a new relationship with a really great guy. I haven't been very lucky in romance, and in the past, every time I met someone I really liked, I ended up getting the rug pulled out from under me and getting dumped when I thought things were going great. This has left me with some raging insecurities. How can I calm down so I won't get so freaked out that I sabotage the relationship?

--Panicky

It's good to let your partner know you don't take him for granted, though idea...