Is it normal to think people don't like me even if they keep speaking to me?
I have this belief that people dislike me because I'm always alone and have no backbone. Recently some different people have been very nice and friendly towards me and I don't understand what they would want to do with me. I automatically don't believe that they want to get to know me or be my friend. Yet they keep being very friendly to me,
for example I am a college student, recently each of A, B and C are being friendly towards me. In addition they are all coming from separate places:
Person A is being nice to me just wants my help with a certain subject?
Person B is quite shy and is using me as a stepping stone to improve his social skills? He also mistakenly thinks I'm into sports when I'm not. He also mistakenly thought I was as smart as him but I'm not.
Person C is so concerned with being not being rude that since we once had a run-in, he feels obliged to say hi to me now out of pity and a sense of obligation.
All these people just keep being nice to me - it's freaking me out - could they actually like me?! Or are my beliefs more likely? Am I paranoid; are the above examples typical of peoples' reasons for speaking to others? I have no friends due to this life-long belief (I had a bad childhood). I would like to think it's not normal to think they don't like me, and that these people are genuinely interested in me, but I just don't believe that, although I want to.
(PS I talk back to them and try to be nice, helpful, etc, but I can't approach another person first so if they don't approach me, I sail past them because I'm sure they don't want me to say hi, as I'm worried they might think I'm presuming we're best buddies which would scare them - I don't want to be thought of as a stalker).