So Over Emotional

Recently started college again, I’ve been dating my boyfriend for awhile now. I just feel like I’m super clingy and get over emotional. I’m anxious about school and I’m anxious about him. He’s recently struggled with a lot of depression and anxiety. Sometimes I get so sad when I have to leave him. Today we hung out all day and than he wanted me to go home. He said, “babe don’t get mad when I tell you this but, I want you to go home so I can have some alone time.” I just got really silent and packed up my stuff and put my shoes on. Then, he said, “are you mad” I said, “no.” Then, he hugged me and I just started crying. I don’t know why I felt so hurt about it I just apologized and told him that I just miss him and he said, “aww.” And then he asked if he needed to walk me out to my car. I said, “no.” Then he walked me to the door and said he loved me I gave him a hug and drove home and cried. I just don’t understand why I’m like this recently. I’ve been so good about giving him space but, sometimes I just get all emotional. I love him to pieces. Does anyone have any advice for my situation? Any ideas on how to not be so emotional? Thank you in advance and sorry about the long post.