So there's this guy. I love him and don't know how to tell him?

Let's call him Fred. I've been in love with Fred for 7 years. I'm now 23. Fred and I have dated on and off unofficially. Every time Fred would leave, eventually I would find someone else, then Fred would come back in my life and I would inevitably have to dump whoever it was that I was dating. Last year, Fred and I had a bad argument, he told me he didn't love me, and I promised myself that I would never dump anyone for Fred again. I started talking to someone in November, let's call him Bob. Bob seemed perfect and I liked him and saw him often enough. Well Fred came back a few weeks after I started seeing Bob. I was madly in love with Fred, but was seeing Bob and had already made a promise to myself. Well, Fred and I started being lovey dovey again and he asked me to be his girlfriend in December. It's everything I always wanted him to ask me, but I was so confused, so I told him truthfully that I was afraid to be his girlfriend. Besides, I did like Bob and didn't know what to do. Eventually, I told myself that Bob just had to go, so I broke up with him on January 2nd. Well, we weren't actually dating, but I told him we had to stop talking... Well, I felt bad about it a bit, and Fred started being stand-offish (I think he suspected Bob because I would constantly hide my phone)... Well, Bob started msging me again, so I would reply and at the end of January, he told me that he thinks we should stop seeing each other. I agreed... But I was upset because I felt abandoned by Fred... again. Well, Fred would still visit me. Bob started msging me AGAIN, but I didn't reply. I love Fred. It's now March and Fred and I see each other almost everyday. He does kiss me, but it's not the same. I think he's holding a grudge about my indecisiveness... I really love Fred, but I don't think he knows and I don't know how to tell him. I'm afraid to apologize about Bob in the off chance that he doesn't know. I'm afraid that Fred doesn't love me back, so that's why I'm afraid to put myself out there. Our biggest problem was shyness and lack of communication. I know that I should have just said yes to him in December, but I was stupid. What can I do to repair this? I don't want anyone else but Fred ever. Help!