Back in January I became friends with a cancer guy I met at the library. I'm a happily married Capricorn and at the time I thought he was happily married too. We chatted about physics and astronomy. Fast forward to April we were chatting every now and then. He kept inviting me to coffee then canceling, then he told me he's afraid to spend any time with me. I asked if I said or did something wrong and he said it wasn't about anything I did or said.
The friendship sort of naturally dropped off then in June he reappeared and asked if we could talk. I said okay. He told me that he keeps thinking about me and wanted to be friends again. I told him as long as it's platonic, okay. Then in August he disappeared after we had an argument because he kept asking me about my marriage (am I happy, am I truly happy ect). Then tadaa, yesterday he reappeared telling me he thinks about our friendship a lot and wants to meet for lunch.
What is he doing? Should I just ignore his email because I don't have time for people who want to drift in and out of my life. Why can't he make up his mind about being friends or not?