Devote what time you have to making them feel special. If you don't have much time use all of the time you have to fully devote to them. Be attentive to them and if they care about you they will be just as attentive to you. Decide on something you both wan to do and do it. For example if can splerge a little take them out to a nice hotel with a nice suite and have an expensive mean. Afteroods if you want to watch a movie, make love or even shop it is what you both want. Make it a memorable time.