I hope not! If they were planning to break up, I assume they would announce it, or something. They released a new single earlier this year, that's a good sign, right? :-)

Honestly, I don't think their comeback is over. Despite Tomoko coming back with Tommy heavenly6, the bands probably just keeping quiet and working on a new album.

After doing some digging about it appears that they are reforming with a new single out sometime later this year.

I will try and dig out a link for the post/posts with the info.