Confused??

I have been talking with this guy a while now and I am confused as to if I should keep trying or give up on him. We will have a conversation and sometimes he starts them and when I reply he seems to leave me on read. And I don’t know if I should ask him as to why he leaves me on read or if he’s not interested in me. Which confuses me even more because he acts like he likes me by flirting with me and calling me cute names. Why are guys complicated at times?