The former Tottenham keeper is seen at Barca as a replacement for the wantaway Jasper Cillessen.
Lopez told Sport: "I'm happy at Betis. I signed for five years and I have four left. I improved a lot and I felt the fans' love. My family is also happy in Seville. I cannot ask for anything more.
"Rumours about FC Barcelona? These are things we talk about and I do not want to be involved. The rumours are still there but I'm focusing on Betis and the national team. I cannot control anything else.
"I do not want to be involved in rumours."