We appreciate the sensitive nature of this question.
Technically, it is not prohibited for you to have physical contact with those whom you date. However, it is customary and strongly recommended to observe negi’ah until marriage.
There is no clear-cut halachic standard for what would or would not be permissible in this case. Since some halachic decisors distinguish in some circumstances between sexually affectionate touch and other touch; that might be a standard to consider. Whatever you work out, we recommend trying to decide in advance on your red lines, in order to prevent uncomfortable situations.
Please let us know if we can be of further assistance.