I Don’t Know Anymore 😞

I’m sorry this is so long but I appreciate you all for taking time out of your day to read this. I’ve been with my boyfriend for about 4/5 months now. We met online and everything was great when we first started dating. It’s a whole different story now.. We always argue. He makes me feel a certain way, small almost. He’s not my usual type, he’s quite cocky. He was charming at first and promised me things. He did something a couple days ago which made me feel a bit startled. So we were in his bedroom and he said he wanted to show me something. He pulled out a gun which later on I found out was fake. He jokingly pointed it at me.. I didn’t know it was fake at this point. I ran out of his room in fear and he started to laugh. Another time, we were in his car.. I went out for a friend’s birthday party the night before and he asked me how my night was etc, he then asks “did you cheat on me?”. I obviously replied no and if I remember rightly, he asked again. I got fed up of him asking so I sarcastically said “oh yeah, definitely cheated on you”. He then told me to get the f*ck out of his car. I explained that I was being sarcastic because he was repeatedly asking. Sometimes when we’d argue, he’d punch the stirring wheel or he’d get out of the car and start kicking stuff around. I think one time he kicked the wheel of his car while I was in it. We have good times together, but it changes very quickly. Another time, we were sitting by the beach in the car and we started bickering about something.. I can’t remember what about but I started crying because I was so drained and went down to the beach for some space. He came and followed me and everything was fine. It’s like a constant merry go round. He’ll make up with me and it’ll all start again. I don’t think my mom approves of him, she says he’s sly. My mom was in a physically/emotionally abusive relationship with my father and I feel like if anyone knows about bad relationships, it’s her. I need some advice please 😞