i need to learn to trust

wednesday night the new guy came over.  we finished a box of wine and were pretty drunk.  i don’t remember much.  i do remember that he said he wasn’t sleeping with anyone else and we are both happy with our situation right now (which is a little wrong on my part, i’m happy but i want more).  oh, and i mentioned that i didn’t want to be a rebound for him and he looked at me like "well we are past that point" and he said it was just supposed to be a summer fling and then we have still hung out till winter.  we had fun from what i remember.  his dog met my cat.  it was fine.  then, he was evasive with my friend when she invited him to her new years party.  he had this girl (who as far as i know is only a friend, though i have suspicions) come down for the weekend and stay with him.  from thurs-this morning.    i need to trust him when he said he wasn’t sleeping with anyone else but why would he not tell me this chick was coming down?  i figured it out thru facebook.  she went to his gigs and everything.  i’m not sure if she was playing with him or not.  but, why would he want to spend new years with her and not me?  it makes me really sad.  and it makes me wonder what else is going on.  i still consider myself single and i’m open to meeting anyone, but i’m just not interested.  i know my lack of trust is what is making me feel this crazy and i also know that there are legitimate reasons for me to be acting this way.  i hate going slow.  i want more.  now.  a commitment.  i want to spend more time with him and go out places and whatever.  just not sure how to make that happen.