F18 and M20

Hello! I really dislike turning to online platforms for advice, but I'm at a point where it's my only option. I’m a female, 18, and my boyfriend is 20; we've been together for almost two years, with our anniversary coming up in mid-March. Our relationship has had its ups and downs, including breaking up and getting back together multiple times. Additionally, his family has been less than welcoming towards me, often making rude comments, which has left me feeling guilty as though I've done something wrong. Although he has cheated on me in the past and I’ve chosen to forgive him because of my strong feelings for him, I've recently found myself seeking attention from other guys. I feel like I'm not receiving the attention I need and deserve from him. I have BPD and other mental health issues, and I’m not sure whether these factors play a role in my feelings or if the situation runs deeper. What do you all think? Should I consider ending things, or would it be worth trying to work through our issues together, given my deep love for him? I’m still exploring my options. I would really appreciate any advice or insights about my situation. Am I overthinking this? Am I overreacting? Is this a toxic relationship?