Teaching my daughter about mean boys

Well I've been MIA from this blog for far too long and I'm making it a new goal to invest more time into it.  Something happened today that I felt worthy of blogging about.  My mini and I were at a local indoor playground.  We all know how that goes...older kids are usually running around completely unsupervised while mothers like myself hover around.  My mini is now 3.5 yrs old (wow time sure flies!) and is in no way ready to run wild in such places while I just sit and socialize.  Anywho, I digress.  The point of this post is mean boys.  There was a boy roughly the age of 6 and he in his own child like way forced himself into my child's playzone.  She told him no, even kicked him away at one point, but he persisted and she caved.  Allowing him to take her hand and to lead her off into play that she had no interest in doing.  Mommy fail on this one I suppose.  I observed.  She shortly came to me in tears telling me that he was mean to her.  I suggested that we play somewhere else, but she wanted to keep playing with him.  I told her that if he continued behavior that she didn't like to tell him no and to play elsewhere.  Eventually we left.  Later she told me that he was her boyfriend.  Excuse my French here, but HELL NO!  As a single mom that doesn't date, it is difficult to show my child how a real man is suppose to treat a lady.  She certainly has male role models in her life: papa, uncles, etc. so she sees how they interact...but nothing long term and in her immediate comfort zone.  Now I read somewhere at some point that if a boy makes you cry more than he makes you laugh that he isn't worth the time of day and I told her this.  How much about relationships can a small child process when an adult woman is still trying to figure it all out?  She told me that he's nice now.  I asked if he ever apologized.  She replied no and I could tell that she was bothered by this. (Mommy:1) However, she continued it was okay because he was her friend now.  We clearly have more work to do.  Although I must say before this conversation she was greatly upset that we left and that she didn't get to say goodbye, but hasn't mentioned his name since.  Maybe she was able to process what I said after all.  Fingers crossed!  We both have much much more to learn.