Maybe he already started getting stalkerish with her. Granted they spent time together on the beg and would comment back and forth to each other, but a lot of her recent pics on Instagram he's bombed with comments. If you scroll back a bit, you can see a jump in the comments where he seems a lot more clingy. In brum he'd flip the camera on her in lives which she seemed peeved with and there were times when she'd be on her own waiting for the hotel lift, perhaps just wanted some space from him, and he'd be in the lift as the doors opened filming her again. Granted she giggled for camera, but it just seemed like she was a bit suffocated. Him following her round filming her in bars and posting her business probably topped it off...