After my(21m) post yesterday I found out my gf(19f) needs a big dick to cum and I don’t know what to do?

After snooping around my gfs room yesterday I found her dildos which I was intimidated by as they were all so much bigger than me. We started talking and eventually the conversation turned spicy and I asked if she has a thing for big dicks and she said yes. She also told me she can’t cum unless she’s completely stuffed and the thing is I can’t do that because my dick is only 4.5 inches and I don’t really want to use toys all the time. What do I do?