<human>: Provide a brief overview of the text.

To start I have a shar pei boxer mix (2 years old named Dexter) Great dog easy to train,  never had any problems. My buddy has a pure bred boxer,  he's not neutered,  and 1 years old. 

Now to the problem.  

My buddy left for Vegas today for his anniversary with his wife, and last second had the person watching his boxer bail on him. He was in a bind,  about to cancel his plans when I told him I'd watch his dog...  I mean...  How bad could he be? 

His dog is a bully. And now I don't know what to do.  His boxer will not leave dexter alone,  won't let him go anywhere with out trying to hump him,  block his path or nip at him.   I feel like Dexter  is so uncomfortable and he won't go anywhere near him. Our dogs have met before at dog parks and they were totally fine,  no problems whatsoever.  

Anyone have a way to have them both get along? I've tried walking them together and feeding them together but dexter seems like he just wants to leave and curl up in his kennel and never come out.
<bot>: buddy left for Vegas,  I'm watching his doing. His dog isn't getting along with mine.  Any ideas?