<human>: My girlfriend has been my best friend for a long time now and recently confessed to me after a long relationship tension between us.  
  
My girlfriend always wears her ex-boyfriend's gold necklace that he bought for her when they were friends/dating/I don't know.  

Yesterday she was real quiet and when I asked her what's wrong, she confessed that she has been feeling guilty that she has been wearing her ex-boyfriend's gold necklace. She assured me that it's not something she keeps to associate her time with her ex and that it was a birthday gift. She really likes the gold necklace and respect that was, in fact, a gift and not anything else. After telling all this, she hopes this all means something because she doesn't want secrets between us.  

I was in fact never bothered by all of this until she said all this. Now I'm paranoid and feeling inferior that her ex-boyfriend is somewhat still in her life. I actually dreamt that her black ex-boyfriend was smiling and taunting me that she has "imprinted" her with the necklace and she will always remember him and return to her kingdom come when I'm not around (we're in a super long distance relationship, 3911KM apart).  

So help me /r/relationships.  

I am trying to be mature and understanding. Ever since getting cheated for the first time, I get paranoid of being cheated. I have been trusting mostly with her since we've known each other for years and we're best friends from the start! 
I am annoyed of the necklace and I can't tell her to remove it. I am thinking of getting her a gift that she'll remember but I'm barely living lol.  

Sorry if my English is shit. I speak Singlish mostly.

Can you give me the gist of the text in a nutshell?
<bot>: Gf keeps ex-bf's gifts and I'm paranoid. I want to be more trustworthy and more mature. Please help.