Don't want my future kids to find their dad's porn

Hey guys, i'm new here so i'd like to introduce myself. My name is Jonah, I'm 14 years old and I have been watching porn on and off since I was 8. I went a long time without watching it in 4th grade (I was embarrassed because I got caught) and after that I watched it on and off, like every three weeks or so. My problem really started in 6th grade when I got my first cell phone, it didn't take long for me to find it again and ever since then I haven't gone without masturbating or watching porn for more than 7 days. Back in august I started talking to a girl who lives in Minnesota that I had talked to on and off for some time (in 7th grade I used to fuck around in chat rooms and I talked to her friend online) and we fell in love. In February me and her met up and we lost our virginities together. I had hooked up with girls before that but it was my first time going all the way and my first time doing things with somebody I cared about. I took a break from masturbation and porn four days prior because I was scared I wouldn't get fully hard, I did but after doing it for the first time I only got fully erect once and we tried to do it again several times after that. This is when I knew I had a problem, I'm a confident guy when it comes to girls and I know it wasn't just nerves. I want to have no problems having sex in the future, but apart from that I really love this girl and it hurts her that I watch porn. The last thing that I want to do is hurt her, she's everything to me and despite what people say about how your first love never works out I've had experience and this girl is really special. I'm making a commitment to her and to our family in the future, I've seen my married dad's porn collection and it's pretty disgusting, I don't want my kids to grow up and think it's okay for their Dad to seek out other forms of sexual gratification besides their mother. Sorry for the big block of text, but this is pretty important to me. This is the first day of my reboot, and I know it's gonna be one hell of a challenge but I've made a commitment and i'm gonna do my best to keep it.