You feel like every single 17 year old feels when that first relationship breaks. Strangely though they end up in another relationship and another and at some point wonder what the heck it was they loved about the first guy.
I'm sorry your Father was abusive to you, this is your chance to ensure who ever is going to be in your life, is never abusive to you, verbally, emotionally, physically none of it.
Are you still pregnant sweet? This will play with a lot of your emotions and would also answer his cowardly "running away" . BUT, your family have told you he's toxic, from reading I think he's no good for you, you have a chance to end up with someone AWESOME... So keep moving along, don't shed any more tears for this guy...