Judging by the way some of the people in the background of her videos give her the side-eye while she's screeching into the camera in very public places as if she's the only person in the world, I doubt many people there would want to be her friend. She has no concept of public decency or the fact most people in the restaurants she visits just want to have a nice, quiet meal and not listen to her shouting the whole time. Due to that kind of behaviour, if I were her neighbour, I would f*cking despise her.
I agree that she will probably try to latch on to Connor's friends' partners, and that it will ultimately turn sour because pushy Elle has to be number one, and the fall out will probably jeopardise Connor's friendships.
I think this move is the beginning of the end for their relationship. Elle will feel threatened by the females in Connor's friend group and try to force him to move back to the UK and I think Connor will stay. I've done some research lately (for my own purposes) and I think if a baby is born in the U.S to foreign parents, the parents have a much better chance of being granted a green card. So Connor could use the inevitable new baby to get permanent resident status after his 3-year VISA runs out.