i guess i didnt learn the lesson

so i nd 2 go through the bs again.  i feel like a dummy.  ive complained about this "friend" before.  I wanna think of him as a friend, but most of our interactions leave me feeling taken advantage of.  and i just dont get y he wld wanna take advantage of me.  i dont have anything.  theres no reason to take something from me.  i just don't get it.  i keep wondering if im overreacting b/c of what ive gone through with my husband.  my gut says no.  this guy is unreliable.  he appears to be a sweet guy, but i gotta wonder y in the world he wld be so insensitive? maybe he's not a complete asshole.  maybe he's not trying to hurt me, but is just really insensitive. 
he dropped by sat.  i called him when i had decided i was done.  that was my mistake.  so he comes over and hangs out.  that was cool.  but then he says he wants to buy my cookie inventory.  ( i bake cookies and sell them)...so he says he wants to buy 4 bags off me.  which costs $16.  the last time he bought cookies from me he didn't pay me for a while.  i dont remember how long it was.  but it was too long for me.  he's unreliable.  im unemployed.  im a single mom of 4.  y wld someone want to take anything from me? 
so he left with the cookies and some promise of coming over later.  and he didn;t and he didn't call and i called the next day and he didnt answer and hasnt called me back.  this makes me feel like we're not friends.  and i guess thats true.  maybe i wanna think of us as friends b/c weve had sex, but his behavior is not friendly. 
until he pays me for the cookies he took, he has taken cookies from me.  im unemployed. y wld u do that? if u don't have the money on u then don't take the cookies until u do.  and i shd have sd that, but i didn't wanna offend him. 
and i feel offended.  i feel like u borrowed money sd u were gonna pay it back by a certain time and didnt.   and u know im in dire need, so why in the world wld u take/borrow from me?