Most Helpful Guy
U can try and get over it but don't have sex with him for a while until u trust him fully. you're also entitled to leaving him, personally I wish I had waited to have sex with another virgin it's just a better way to start but in the end it's your decision based on how u know him but value yourself
Most Helpful Girl
'he had sex days before we were official'
.. you weren't officially together. That's something that is true, regardless of whether you were a virgin or had slept with countless guys in the past. So no; he didn't cheat on you.
The best way to get over it is to just stop dwelling on it. Stop spending time + energy thinking about how badly he hurt you. the more you victimize yourself (when he did nothing wrong in the first place), the more you'll draw out this hurtful feeling.