What to do to spice it up ?
I second the socializing idea. I know when I start to feel in a rut, almost always I’ve been solo too long. If you’re up for volunteering, finding a nearby secular means of volunteering is good. Your local government (school boards are getting DeVos’d and regressed) could always use an atheist, especially where you live to hell being truer neutrality and unbiasedness to our government, roots up.
Meet new people, do sport... something social... I do Bootcamp’s where you meet great people. Maybe flirt a little. Travel, visit as many countries and different cultures as possible.