Does he love me?

So I'm into this guy, and a few days ago he told me that he is going mad for me. We met three years ago at summer internship. And we always had a lot of chemistry but on top of that we've always been really good friends. We recently reconnected through Facebook and it's like no time has passed. We've been talking for the past three months on Facebook.

I have a pretty good job that allows me to travel when I want to, so I arranged to meet up with him where he lives. I spent the night at his house and I felt like I could truly spend the rest of my life with him.

He is really insecure though sometimes open up and then other times I could tell He is needing me to validate how much I looked really like him.

She's just so sweet though and we get along really well. He said that he has gotten a little more mad over me more recently and I said I felt the same. He asked me if I consider working in the state that he lives in.

My friend told me that she thinks he is in love with me. Does anyone else think so?

I'm thinking about posting something on Facebook to get his attention and let him know that I like him. Just something along the lines of “I had a lot of fun with you, And miss you”. I just want him to know that I'm not afraid to let other people know.

Advice?