yeah i sufferer from that a lot , basically from my experience with guys , they have cheated and lied to me and broke my heart , i have a wonderful partner and yet i still pushes him away not that i mean to but because of my past experience i do find it hard to trust a guy .
with the paranoia it's the same thing , we actually look for reasons (something we can use to push a guy a way) and ask loads of questions especial when it comes to interacting with other females , and i find most of the time he is just being friendly but like what i said i had bad experience with guys going off with other woman so i just like to make sure, yeah i can over think things that make my paranoia worse but lucky my partner understands that i don't mean what i say and understands i have trust issues.
unless you are willing to accept the fact that she may question you a lot about what you do with friends (girl friends) and be keeping a keen eye on you and if she see's something she don't like you doing she may attempt to try and push you away or it can lead to an argument.
this is what i find myself doing most times . but im lucky to have a guy who understands and has gotten use to it and ignores most of it.