I need some girl advice

I am in love with this guy I have been seeing for almost a year. The only thing is we haven't made anything "official." My feelings for him can be so overwhelming at times that I feel like I am just going to explode. I think I feel like this because I haven't really expressed much of my feelings to him. The reason why I haven't is because a part of me is afraid he will be scared away. He also hasn't exactly shared how he feels about me as well but I feel like he hasn't because I hide my feelings very well so he is also unsure and doesn't want to say how he feels if he thinks I don't feel the same way. Everytime we see each other I want to say something but I get to scared. I am so afraid of hearing what I do not want to hear. I need some encouragement and /or some advice of how to go about bringing up the conversation of how I feel about him. I don't want to necessarily say the words I love you just yet, but I want him to know how much I do care about him at least and ask him how he feels about me. So if anyone has been in a similar situation or just has some advice on how to approach this, please comment. Anything comment will be appreciated.