We've been dating for a little over a week now and while it's great when we're actually psychically together, every other moment of my life has become an emotional hellscape. I've been splitting nonstop and every little instance where something doesn't play out exactly the way I expected, I keep thinking that she doesn't really love me and only settled for me out of loneliness, etc.

For instance, she left me on read for a message that totally didn't require a response 5 hours ago and hasn't messaged me since. A normal person would realize that this in no way means anything about the status of our relationship, but all I can think about is: "she doesn't love you, she's probably talking to some other guy, why would anyone ever love you?". 

I honestly just don't know what to do, every moment away from her is so painful and every moment with her gives me new material to feed my paranoia and insecurity. She's a wonderful human being that would never do anything to intentionally hurt me but I just can't ever seem to see things for how they really are.