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

Hey Guys, my recent bf over 5 months, is still in touch and going out every final of weekends with his ex-girlfriend. Should I be worried about that? Should I talk to him? I met my boyfriend throught a dating app, and he works in my city and stays in weekend in my city, but in final of weekends he goes to his home town, his ex-girlfriend works in my city too and goes to her home town on final weekends that is the same home town as my BF. I was never there, and other day my boyfriend open his facebook account and was the second time that I unintentionally saw his messsages to his ex saying "get out...I am here", so I was thinkinf that they are still in touch and worse than that going out. My Bf never said to me that he is going out with his ex. We don´t have any friends in common, but his ex as the same friends and are in the same group of friends that my BF. The best friend of my BF is the best friend of his ex girlfriend, and my BF introduced to me that friend... I don´t know what to think! Sorry my poor english!
<bot>: My BF still in touch and going out in final of weekends with his ex girlfriend, and he never said to me that he was going out with her. How should I react?