Even though you've had troubles with Robby this year, it sounds like there were some good things that happened to you as well. It sounds like you had some people in your classes you get along with and also some friends you became closer with. That in itself is a good thing since it's nice to know you have some people you can look forward to seeing during the summer and when you start school next year. Also, four day weekends are pretty sweet too.
As for Robby (this is just my opinion and if you totally hate it and/ or disagree with it then forget I even said it. It's only one way of looking at it, not the correct answer), you probably will never completely forget him. I heard this song called, "The Last Goodbye," which is about a girl who's finally saying goodbye to a relationship to a "half-hearted love that will never be whole" and I can't listen to it without feeling extremely depressed because it makes me think of my first love and how if I could, I'd say goodbye to his memory, but it's just not that simple. This person was a part of your life at one point and you spent quality time with them, whether it was positive or negative. That's something that you can't really say goodbye to. Yes, you may not see them again and choose for them not to be a part of your life anymore, but their memory will always be there in the back of your head, even when you think you've forgotten all about them. Acceptance about everything that happened between the two of you is the key to being able to live your life. Whether it was good or bad, you can't change what happened. It's in the past now, so learning to accept that was just one part of your life,not your entire life and that he's one guy who you opened your heart to and not the only one (there may be someone else who comes along in the future). You don't have to forget about him, just accepting the situation for what it is through time can help you let go. Has that been the case for me yet? No, but I'm in a better place about it than I used to be. It may take a while to really accept the situation on my end because it's one that was very confusing and never really solved, so I'm left with questions as to why things happened. However, he's not the reason I'm living. He's not the sole focus on my mind. I realized I don't need him in my life because it's not healthy for either of us. In the end, it's best that we're not in contact anymore. Just accepting that he was in my life at a point and he served a purpose of some kind (something you quoted to me about people a long time ago) is what I'm trying to do. I guess that's all we can ask for. Forcing yourself to forget only brings back the memories in a stronger dose. Learning to accept it and moving forward so the hurt stings a little less is what you can ask for. Did this make any sense at all? I must be rambling a bit and after a while, I may have repeated myself a bit too much. Oh well, you can read it or not. I won't be offended at all either way. I hope you enjoy the rest of your four day weekend and the fact that your last day of school is very soon... that means more time for fun and no more stress of schoolwork you need to complete!