I suggest you try to look for a new job. It doesn't cost you much (other than some time) and you can test if you think the grass is greener on the other side. Sometimes it is, and sometimes it isn't. It can give you a taste of the hiring market, which isn't very easy right now, and that can sometimes make you appreciate what you have. If you are taking interviews and everything sounds boring, maybe that will give you what you need to look at different careers and then start interviewing for those jobs?