Are you jealous when your lover goes out without you? A little jealousy can even be flattering for the partner because you show that you do not like the idea of sharing in that context. But if you tend to spy or even to rummage through the mobile phone of your partner you have a serious confidence problem. If there are no proved reasons for the opposite, you should trust your companion and avoid too much restriction. Mutual trust is one of the key prerequisites for a solid relationship.