Answer: It is difficult to identify a plant without actually seeing it, but the leaf shape and placement are pretty distinctive - my educated guess is that your vine is a honeysuckle. Just to make sure, do a web search on Lonicera (the botanical name for honeysuckle). There are many varieties and you should be able to find a picture that you can compare with your volunteer vine. If it is a honeysuckle, they will grow in shade but flower best in sunshine and sometimes they need 2-3 years of growth before they have the reserves to flower.
Hope this information is helpful!
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