Aquarius man behavior

I have recently been texting with this 19 year old Aquarius guy for about a month and I'm really starting to like him. Although he has a few behaviors I dont understand and I was wondering if some fellow Aquarian people can help me out?

1. Why constantly text me for days at a time and then stop for a few days. He has also started to text me and then just leave me on read or respond later with something completely different. Why?

2. We kind of started talking on a hookup bases only but now I like him more than just a fwb type so should I not have sex with him?

3. What are some major signs I should look for to tell he is really into me?

1. Typical far all Aquarians. Give him some space, he needs it.

2. Tell him that you want to be more than fwb or imply it in some way.

3. I don't think I can answer this question, but if he spends a lot of time with you - that's a good sign.