<human>: Can you give me a shortened version of the text?

My boyfriend and I have been together just over 3 years. We started dating in college and have been inseparable ever since. We lived together in college, moved across the country after school together, have three cats together, the whole shebang. 

After 8 months living many states away from home, I found a great job in my field in the city we grew up in. We agreed I should take the job and he'd move back home with me after a reasonable stint at his job there. Last week, he finally moved in with me in our hometown! But he's already got a job offer for a great position in his industry, just in a city 5 hours away. 

Our relationship has been wonderful until now. We always agreed on our long term goals and relationship needs. We have similar hobbies and interests, and many mutual friends. We get along with our in-law families really, really well. We've both been very invested in our relationship and building our adult lives together. 

Here's the problem- before I met him, I had one previous relationship in which my lack of self confidence and insecurity caused the relationship to fail. We were long distance and I was constantly paranoid about his imagined infidelity and jealous of imaginary girls in his life. Nothing he could have said would have helped me. It was something I had to overcome on my own as I matured. I see my otherwise wonderful boyfriend starting these same insecure tendencies (this is his first relationship) and I don't know if I can help him. I'm worried this is going to destroy us. Part of me is starting to think ending things before he can move away would leave us in a good place with lots of good memories of each other, untainted by the emotional turmoil of a bad break up. But part of me sees the 5% chance it will work out and hopes desperately that we'll be okay. 

We expect to be long distance for at least the next ~5 years while we establish our careers. I have no interest in living in his new city, and he has no plans that lead to a job in our hometown. He keeps saying "It's only 5 years! That's nothing in the scheme of the next 50 years of us being together!"
<bot>: My amazing relationship has a 95% chance of falling apart from distance. Is the 5% chance worth the potential heartbreak?