How to know if someone read my text message on iPhone?

This guy that I have been on & if with for 7 years just ended things with me. I'm devastated but there's nothing I can do about it. I wrote him a long text the other day just to get my feelings out but I'm not sure if he actually read the message. We both have iPhones so when I sent the message it went through however you have to click on the actually message to see the whole thing. It's bugging me because I need him to know how I feel. Is there anyway to know if he actually read the message?

Let me just say I did not write him to get a response. I just need him to know how I really feel.

It gives a "seen" and the time, if the person reads the message or opens it. Else it only gives a "delivered" and the time. I'm sorry that he broke up with you. Hope your doing better.