Don't worry Adora. Many people feel that way. The important thing is that you feel safe with your partner. It's not a popular line but friends come and go and you don't need them to be happy. My parents have been happily married since high school and they never really had many friends and were always kinda' shut in. But they focused on their relationship and their family and have been very happy without having friends for so long. We enjoy our family game nights and home cooked dinners. Mom and I are best buddies and Dad and I can do anything when we put our heads together. We never needed anyone else.
If you aren't getting much from the world, that's fine. Focus on the happiness you can have with what (who) you have now.