• You're really great, and I had a lot of fun, but I think we're better off as friends.
• Thanks for last night, it was fun but I don't think we're compatible in the long run.
• It was nice to meet you and spend some time together, but I don't think this is going to work out for me.
• Thanks for giving me a chance, but I don't think we have enough in common to pursue this further.
• Last night was fun but I just don't see us going anywhere romantically, so I think it's best if we just remain friends.
• You're a really great person and I enjoyed our time together, but I just don't feel any chemistry between us.
• Thanks for last night, it was fun but I think we're better off as friends rather than anything romantic.
• It was nice meeting you and spending some time together, but after giving it some thought, I don't think we're compatible as anything more than friends.