Am I a whore? How do I move on?

Last Friday night my boyfriend of two years broke up with me without an explanation. He is 20 and I am 18. Everything seemed so normal until Thursday night when he stopped talking to me. Friday I hadn’t heard from him at all until he showed up at my house. He had a box of all my stuff and said “Here’s your shit we’re over”. No explanation and i’ve tried to reach him but he blocked my number and all my social media profiles. I feel so betrayed because I would’ve done anything for this man and can’t believe he would end two years together without giving me a reason. He was the first man I’ve ever dated and he took my virginity as well. I can’t believe I gave him something like that and he doesn’t have the decency to at least explain why he didn’t want to be with me anymore. He’s been with me through some of the most important moments of my life and I can’t imagine being without him. He’s in all of my prom photos, graduation photos, first day of college photos, etc. We had plans and goals together and I just feel like my heart is shattered. I feel alone, i feel like a whore for sleeping with him when we won’t end up getting married, i feel afraid of being without him since he’s all i’ve known for the past two years. I don’t know how this will all be okay and i’m so lost. All of my dreams are of him and I just miss him so much. It hurts like it just happened today and hasn’t gotten any better over the past almost two weeks.