Please help I’m confused

Me and my significant other have been dating for a while now we are both in the military and we both went to a remote location ever sense we have been here I’ve been so insecure we with each other 24/7 back home and it’s not the same here now I constantly nick pick at her about other guys. If I see her look at a guy too long or if I see her laugh with them anything involving someone else that is male I get super uncomfortable and almost even jealous that someone else has her attention she talked to me yesterday night and said she’s been having thought of being on her own and leaving me which honestly broke me we are still togather but I guess she wants her space so we are not spending much time together or talking much I guess pretty much a "break" I know she’s not the type to go around a mess with another person she truly wants to find herself again and see if she truly wants to be with me I guess and I have to admit i was in the wrong for sure I would be controlling in ways and was someone I didn’t wanna be and always on defense mode for any person talking to her that was a guy. And now it caused her to want a “break from me I talked to my mom because moms are always right ? And she told me I was definitely in the wrong no one wants to be with someone who is controlling and insecure etc my mom pretty much told me she was her own person before our relationship and it’s come to trust at the end of the day and that I can’t control the narrative I just need other opinions on what to do to help save us and my self