Credit: Kate Hedrick/MTV

Ch-ch-ch-changes, guys. So many changes. It seems like just yesterday that Kailyn Lowry first laid her eyes on Javi Marroquin during Teen Mom 2's fifth season, and now? Now they're happily married, they own a home, and they just popped out a baby. This happy couple's lives have rapidly changed over the course of just a few years, and Javi took it to Twitter to reflect on how he's grown as a person since his formative days in high school.

"I was a different person in high school," Javi mused. "I was shy back then, now I love meeting new people. Regret any bridges I burned tho."

We haven't had that much face time with Javi on Teen Mom 2 (he's only been featured on one season so far!), but we'd hardly describe him as shy. This hunk is outgoing, gregarious, and seems pretty open to new experiences. You know, like dating ladies with babies. Plus, Javi is now a proud member of the U.S. Air Force, and it's kind of hard to be shy when you're stuck in boot camp with a bunch of strangers.

By the way, Javi isn't the only one who's gone through a few personality changes. Kailyn is an even better mom than she was four years ago, and she's come so far with her anger issues!

Do you think Kailyn and Javi have changed a lot? Take it to the comments.

Source: Twitter