4.7 inches is actually within average. It's anywhere from 4.5 to 6, I think. You don't need a bitch who would dump a guy just because his dick wasn't as big as her fantasy dick was. Be proud of thy penis.
Wait, WTF. You're 7 inches in LENGTH?! Alright, below is what I said: But, I guess I wasted my breath here. You've got a BIG one pal. The girl's either super spoiled, or she's just bullshitting, or she doesn't like you for some other reason. But SEVEN inches long? FUCK!
Seven inches long and 4.7 around is not small, maybe a bit slim but a seven inch dick is impressive. Girth is however more important it seems.
The woman I lived with from the late 70s through the late 80s sometimes complained that I "bottomed-out" - and my cock is statistically average, at 5.75" long & 4.75" in girth when erect. She said that it was actually painful when it happened. But she said that she LOVED the girth of mine. The majority of women with whom I've discussed this sort of stuff over the decades (not just my partners) have all said that the motion of the ocean is far more important than the size of the wave.