We were together for about 3 years (we got really "deep" into it) and we broke up (I was a little beta Pussy and she branch swung) And I have since gone radio silent about 5 months ago on her and worked on myself.

She tries to contact me sometimes once a month but I don't really respond ( I never text her back)

Today she sent me a text saying "I miss you, I can't measure but I get really sad sometimes and doubt why I left you and feel bad bout why I'm like this"

What would be best form of action here?

1)plate her? 2)delete her number (Should've done this Month's ago? 3)don't respond?