Troubled relationship

My boyfriend of about a month really annoys me to the point where I consider breaking up with him. It's mostly when I'm on my period or about to be when he annoys me the most but I think that's normal because I'm very moody around that time. But even when I'm perfectly fine, sometimes he'll just really piss me off. I also feel as though he's too clingy. He always tells me he loves me and I usually say it back but I didn't at all today. I didn't even close my eyes when he kissed me. I'm ignoring him right now and he sends me thousands of texts and it just gets really frustrating. I feel so bad because I know I'm being a bitch but i can't help how I feel. If anyone knows how to control their moodiness please help. I hate feeling like I'm hurting him.