I am no rose expert, but one thing that should be done about any plant that has too much of foliage and does not flower or bear fruit, is to prune it. When excess foliage takes up all the nourishment from the soil, it does not give a chance for the plant to do anything else. Roses need pruning after flowering but in this case it should be done beforehand too if the plant is big enough. Roses need a lot of sunshine too. Hope this helps.

Can I ask you 2 questions Kennea,
Firstly what are you feeding it? too much nitrogen in the fertilizer will produce leaf rather than flowers in roses. Secondly is it getting enough light?

Also, is this its first year? Many older roses, especially climbers, only bloom on year-old growth.