The Doctor had to get out - as happy as he was to see Romana, talk of the war had partially served to scratch open wounds that had finally been starting to heal. Of course, the whole situation with Davros only a few days previous had been a massive heartache in itself, so the Doctor was feeling overwhelmed, which was not something he was used to feeling. Usually he had his TARDIS for comfort, he'd spent hours tinkering with the thing even when nothing needed fixing just to occupy his mind. now, with absolutely nothing to keep him busy (other than figuring out how to get the hell out of there) he had to resort to the old-fashioned method. Fresh air.
And so, as the Doctor shuffled through the streets of London, hands in his pockets and a worried look on his face, he certainly wasn't expecting another familiar face to appear in front of him. But there she was - blonde, beautiful, and so wonderfully human. The implications of her being there didn't cross his mind at first, a slow smile just spreading across his worried face as he started half-skipping toward her. The smile soon turned into a grin, and the skip soon turned into a run as he dashed for her; she didn't seem to even notice him, but that didn't matter... the thought of her timeline buzzed about in the back of his head, but he didn't care. So what if she was already madly in love with his human-self? She'd still be pleased to see him... wouldn't she?
Oh, who cared? He was pleased to see her, and she at least owed him a hug. "ROSE!" he yelled as he neared her, slowing down only to avoid a painful collision before he wrapped his arms around her waist and lifted her off the ground, spinning 360 degrees before planting her back onto her feet, not detaching from the hug quite yet.