The couple briefly split up last year after Stewart cheated on him with married director Rupert Sanders, reported Contactmusic. "If he fell for someone else, he knows he'd always be thinking about Kristen, what she was doing, who she was with.
The truth is, he needs to be with her and she clearly feels the same about him. "He's done a lot of soul-searching and realises that although their relationship is less than perfect, he couldn't imagine life without her," a source said.
After her cheating was revealed, Stewart had issued a public statement apologising to Pattinson and saying she still wanted to be with him.