I really need desperate help, please. My relationship is in shambles.?

Over the past year I have been having a roller coaster of a relationship. Me and my boyfriend always heads when dealing with our problems, I for one like to talk and sort things out right away while my boyfriend likes to distance himself from me. I often get very stubborn when he tries to walk away and isn't willing to talk things out to the fullest even if that would really help. Despite the fights and arguments we get into every so often, we both know that we love each other very much. We make sacrifices for each other and try very hard to make the relationship work. However, he has fixed his anger problems for the most part and I'm still having a very hard time trying to get over my insecurities. My insecurities of being alone, of being not good enough and just having terrible anxiety. My anxiety has been off the charts within the last month and it's put the relationship in great jeopardy. Last night we were spending time in my room and it got me thinking that I was boring and not a "fun" girlfriend, even though he sat there trying to tell me differently. My anxiety completely took over and I couldn't stop, resulting in being over emotional and saying/doing things I never would want to do. He couldn't handle listening to me being that upset and left early this morning and I made the mistake of bawling my eyes out and being a wreck in front of him. When he got home he messaged me saying that he can't do this anymore and needs his space. I'm completely and utterly broken. Tomorrow I am finding a therapist to furthermore improve myself. I just would do absolutely anything for this guy and I wish he believed me that I'm going to try this time, even though I ****** up and didn't exactly fix myself after all of the other fights. I am head over heels in love and I don't want to let this go. Please help me. Please. :(.