Hi jiggermt,
If you romanced Liara in Mass Effect 1, you will not be tied down and still can choose to romance other characters in the next games.
That being said, it does have an impact on the romances story/characters behaviour on the next games as well.
Finally, as thandalnlyman pointed out, BioWare Social Network would be a better place to discuss such topics and get additional details. You’ll find a truly great community there to interact with.
Thanks for posting in the AHQ, and enjoy your Mass Effect experience 🙂
