How to deal with lust?

Hello everyone;
I'm for the first time in my life in the middle of a reboot while I'm in a relationship. The first time I tried NoFap I was in a sorry state in my life. In my first I was really excited and I have gone for 1 week in my first attempt. That was my highest streak. After that my reboots gradually transformed into a general anti-masturbation attitude. I never tried a serious NoFap reboot for maybe a year or more. Today I'm not in a sorry state in my life. I'm in a wonderful 10 month relationship with a girl a love, my life quality is steadily improving and I don't have any sexually problematic behavior beside prone masturbation (Which haven't caused any visible problem but God knows what the damage is. Scary shit deserving his own tread). So even though I don't "need" a reboot per se, I really can use the extra life force that comes from abstaining from masturbation. I remember the first time I tried. I was so energetic and awesome.

Problem: Normally I would have gone for a PM streak but my girlfriend doesn't want to have sex before marriage and neither do I. But we do anything beside sex. So "Hardest Mode" it has to be. The problem is that I don't know how to continue making out with her and continue my streak. I remember from my first time around 7th day I will want to jump on everything with long hair (Which it is another problem considering she's really jealous but 1 problem at a time). I can't continue to be physically close with her and continue my reboot. I'm on day 2 and I haven't open up the subject to her yet. Last time I said "I'm trying to stop masturbation" she looked like I was crazy. How I can tell her the benefits of NoFap and how can I involve her into this?

Thank in advance for your advice.

 

Thank you all for your responses guys. I will surely introduce her to NoFap but turns out I greatly underestimated the process. It wasn't like starting exercises or any other casual self-improvement project. Turns out M was covering a great deal of sexual frustrations from my past. I dreamt about a ex-platonic love of mine and fantasized her due to chaser effect. I passed that day but relapsed the day after only to find out my student visa could be canceled. It all went down from there I didn't even kept track. I'm restarting today. Let's see how it will go. The reboot is dark and full of terors!