How many clubs are you involved with? If you have something most days then you are certainly meeting enough people. Occasionally you are going to meet someone you want to have coffee with after the meetings but you need to do what you feel comfortable doing. Being involved with clubs is also a great place to meet a future partner because right off the bat you have something in common. Your mother is just worried that you are a loner and will never find anyone but if you are doing things and not in the house when you aren’t at work or school this is not a real concern. You have a social life just night the party life of everyone else. 
