Is it likely the supposed "victim" will show up to court after pressing charges?

I was sitting in the courtyard of my apartment with my dog when an electrician working on the property walked by. My dog ran up to him, not barking or aggressive at all, and the man swung his clipboard at my dog twice. I got upset and yelled at him telling him he was a cruel piece of %#@!. I walked around the complex with my dog and he was standing there on his phone when i was walking back to my apartment. He came towards me and said keep you and your dog away from me. I started yelling at him again, which i'll admit was wrong, and then went to my apartment. About a week later i was woken up at 6 in the morning by police officers knocking at my door and arrested on a warrant. I was charged with terroristic threatening and harment with physical contact then sat in a holding cell for 16 hours before i was released on a promise to appear. I went to court 2 days later and was told that the actual court date is in 3 weeks. Now I'm 2.5 weeks away from the court date and i'm wondering what i should do. As far as i know there were no witnesses to the incident except for whoever he was on the phone with when i was screaming. I never threatened harm to him in anyway. I was just yelling about how mad i was that he came onto my property and instigated this whole incident. The courtyard was huge and he could of simply walked around my dog and i instead of right next to us in order to avoid the whole incident. As well as the fact that he shouldn't of approached me on my walk back to my apartment. My concern is that he claimed i spit on him in the charges which is a lie. I'm worried, since i can't afford an attorney that i may lose the case regardless of my innocence. What should i do? Is there any chance he won't show up even though he has been subpoenaed? In a case like this, do i have any chance by representing myself? Thank you for any advice.