Nope.

Unless you had an agreement, like he would pay you back, or put the funds down towards your common future in form of payment, you shouldn't

You took a chance. Being with someone is accepting the risk that it may not work out in the hand, but making the bet that it will. You gave money betting that you would stay together and marry and spend your life together. But you didn't. If you gave money because you wanted to help him, well you did. You being together or not does not change that.