I'll start by putting my position right on the line: kissing is OK.
We need to address the whole spectrum ("just kissing" included). First, the fact that "romantically oriented" is in italics above is important.
I am obviously not saying that hugs and kisses of affection or greeting to relatives and the like are out of bounds. In some cultures, kisses of greeting — between members of the same sex or of the opposite sex — as well as hand-holding and other forms of physical expression during normal, non-romantic social intercourse, are more common. You might even be able to talk me into the notion that , "non-leaning-in" hugs of greeting, sympathy, etc.
between men and women who are not romantically involved are OK.
If you are dating someone who doesn’t have a personal relationship with Christ, you are playing with fire. Don’t let the relationship progress to a physical point and then hope you can cut it off later. You need all the help you can get in today’s world. Do you depend on Him to meet your needs of love and security?