If you are Catholic but your spouse is not and you were not married in the church then are you truly married?

In the eyes of the Roman Catholic church, possibly not. However, if you have a marriage license that has been duly signed and authorized, and you and the spouse have also signed it along with two witnesses, then you ARE married, church or no church. The church does not marry you - you marry each other ... it's in your vows "I take you (not the church) to be my lawfully wedded ... ... ".

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yes you are as long as you were married in the catholic church by a priest and both you and your spouse promised to raise your children catholic and to fulfill the vows

^^^and the church makes the marriage valid, God was there he was present, all a marriage license is, is a piece of legal paper