When a girl touches my belly, it is very sensitive, how do I overcome this?

After a while you get used to that sensation.

Practice makes it perfect ^^

It’s nervousness/ticklishness. If you feel a laugh coming on, try kissing her.

Have her start by laying her hand flat on your stomach, and not moving it.

The advice above is great. Tell a girl you are in that situation with about your ticklishness. Do as @BarnacleBill suggests. If you persevere, it will stop.

Use more pressure when she touches you. Not light touches—those can tickle, and if you can’t convert tickling into sexual arousal, it gets really annoying.

That is another thing you can do. You can convert that anxious tickling energy into sexual arousal. You can send it to your genitals. All you have to do is think about it as being a surrogate for your genitals being touched.

Thanks for all the answers.
They will help me out!

@6rant6 You got flagged for not being helpfull, you did know you are in the General section, and not the Social section right?

You simply do not like your stomach being touched. I am the exact opposite. I love it when a woman touches my stomach.