I am losing relationships because of being too clingy

Dear Gaone: Please keep my identity anonymous. I am a woman deeply in love but fear losing my current relationship. My previous relationships failed predominantly because my lovers bitterly complained that I was too clingy and emotionally over-reliant on them. Now with my current partner whom I have known love at another level, he is constantly decrying lack of breathing space in our romance. I want us to be together all the time if we are not at work. I do not like being alone. The deep fear of being dumped has always engulfed me from the first time I started dating. I have trust issues though I have never been cheated before and my current bae is entirely transparent with me. I know that it is nigh impossible for my partner to pick my calls all the time when I call. Yet whenever I call and he does not pick (it happens once in a while, he mostly picks my calls), I get anxious and feel out of control, which affects our relationship negatively. Sometimes it feels like I do not have a solid identity, I easily lose myself in relationships. Kindly advise.