Dating while separated

So my husband and I separated in January this year. Well it took me a few months until I started seeing this guy recently. My husband and I both know we are getting divorced here in July. That’s when I can file. I moved in with my grandma in January. The problem is, I feel bad for staying at his place most nights and she opened her home to me. Today I told her what’s going on. Me seeing him and everything. She told me that’s my business which it is but I felt bad because she might worry about where I’m at if I’m okay. It’s not a might, she does worry. Just felt bad about telling my family member that I’m dating someone while being seperated but out of respect i told her! The sad part is, I don’t even feel better about anything yet.