<human>: I strongly believe in relationships and being faithful to the one you love. My ex taught me these ideals after a long history focusing on casual hook ups for me, but after the break up he's been dragged into the hook up culture. While we are back in contact he's not ready to have a relationship for a few reasons.

1. He (and I) are both scared that if it doesn't work now it never will/it hasn't been enough time. We've changed who we are but our feelings for each other haven't still.
2. Because while my friends are supportive despite his mistakes his are not... Conversation went like this:

"Hey dude, so Alexis texted me..."
"Yeah? Did you tell her to fuck off?" 

He said that while we're seeing each other he is not going to refrain from sleeping with other girls, even if he's not pursuing any right now sexually he is casually dating a couple. He is suddenly uncomfortable with PDA (holding hands) even if we are alone at night and he used to love it. 

We have both grown up a lot (more than either of us expected) and I do love who he is now as well as myself. We used to be very codependent and now we are driven to do other things outside of each other, which is just what we needed for this to ever work. I love him indescribably. I can't imagine sleeping with him knowing if he slept with someone else or he wants to.

Give me the gist of the text in a nutshell
<bot>: How do I tell him this and what do I even say? I know what I want, but is getting back into a relationship rational?