Most Helpful Guy
That's a tough call. I lost both my dogs within 2 months of one another, so I definitely know how painful that experience is. I'm thankful my wife was here for me, and it's nice your ex was thoughtful enough to do his best to comfort you.
How about just taking things slow and making sure you both are completely honest about things that happened and about the things you both learned about yourselves when you were alone.
I'm not sure I'd jump into a full blown deal right away, but talking with him and really talking to one another while trying to be as objective as possible isn't a terrible idea.
I'm sorry about your puppy.