What type? Is it harmful?

I’m 19 and I’ve been looking into getting on birth control sometime soon. My boyfriend and I are very sexually active and we use condoms most of the time and if we don’t he always pulls out. I’m not worried about STDs we’re both clean. I’m just worried about getting pregnant because I’m in college and he already has a kid. Neither of us can afford another one.

So I was wondering what type of birth control you think would be the best option? I’ve been on the pill before and I kept forgetting to take it so I don’t really think that’s the best option for me.

Also, would it cause any harm to my body or negatively affect my fertility? I don’t want to not be able to have kids in the future.