Borderline personality disorder -PLEASE READ.

So I've read that people with BPD tend to fear rejection and abandonment, so they make frantic efforts to stop this such as texting a person a lot or calling them. The thing is ive been told I might have BPD but I don't do this. 
Instead I isolate myself, because
I'm scared that if I get too close to people I'll get hurt, I only have one friend who I see maybe once a week sometimes if that, and sometimes I do that because I'm scared if I see her more I'll have an arguement with her. 
My therapist said to me she doesn't get how my moods change so suddenly one minute I'm fine and next I'm suicidal, lonely and empty. She said when she's dealing with her clients, she looks at their social life and she told me I don't have one, she keeps pushing for me to get one but I'm so scared of getting to know people. Like I'd rather do everything
By myself and be by myself all the time. 
Is social withdrawal a sign of BPD and is what I've explained sounding like BPD? 
Answers:
Yes & yes = social with drawls is a sign and it's sounding like BPD 
Yes & no = social withdrawal is a sign and it's not sounding like BPD 
No& Yes = social withdrawal isn't a sign, but it's sounding like BPD 
No &I No = social withdrawal isn't a sign &a it's not sounding like BPD 

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