<human>: Can you succinctly summarize the text in 1-3 sentences?

So the last half of my friendship with my ex best friend was all a ploy so he could get with my girlfriend. He is very manipulative and has done this to multiple couples in the past and he was just waiting for me to stumble a little. Unfortunately I did and he convinced her I didn't love her when I was 4700 miles away and managed to succeed in worming his way into her life. We had been dating for three months so we weren't quite at the don't trust other people and what they say, let alone not listen to both of our best friend because he wouldn't lie right?We sat down this past Wednesday and decided that we missed each other and wanted to work on getting back together because when she was with me she was happy but all he did was push everyone out of her life so she was convenient for him. We had a great weekend full of laughs a few good kisses goodnight, went fishing and had dinner. I feel like this is going really well and im the happiest I have been in months, but I need to address the issue with my ex best friend. He still talks to her and as long as he does he will try and manipulate her. I trust her but I don't trust him if that makes sense. How can I bring this up without sounding paranoid or untrusting?
<bot>: dated a girl for three months and best friemd interfered. Now ex best friend is interfering in me and my ex getting back together. How do I bring it up without sounding untrusting or paranoid?