Got dumped because I've never had a girlfriend, what to do?

Girl i was dating for 3 months dumped me because I'm 30 and never had a girlfriend. She asked what my longest relationship was for thr first time and i said 4 months of dating and she was shocked. She didn't want to be my first serious relationship and broke up with me over a text.

Idk what to do. She said that was my only red flag but it was "a HUGE red flag for anyone"

Edit: Guys I'm not gonna lie to a future partner that I've been in a long term relationship before. I don't believe you can start a healthy relationship on a foundation of lies