Hey TRP, in need of yalls opinions

Background: I was with this girl for almost a year and I consider her my first love. She ended it because she said she "was losing feelings" . I know now it was just because I was getting stagnant and too comfortable. She had this male friend who I was keeping an eye on but I wasnt threatened, he is even more beta than I was.

After the breakup I was hit pretty hard and found TRP which helped immensely with me growing into a man. Before that tho I went all beta on her and went nuclear over text because she told me that her and that friend of hers had kissed. She kept calling it a "comfort kiss" trying to convince me it didnt mean anything . A few weeks later I figured Id talk and get it straight with her (Im actually a nice guy).

She hit me with the "I miss you" so I told her we should just hangout and see if there's anything left.

Problem: We've been talking and chilling for about a week now (havent fucked), and I told her we have to talk about boundaries for another LTR. Now Im not sure if me telling her Im not cool with her being friends with the dude is being beta. I feel like it indicates an insecurity in my frame. Any thoughts?