Ok, so the move caused some of the issue. I understand.
There are many ways you can meet new people. Attend church, your job, join a group of some sort, take up a hobby, make conversation with those you see during the day like clerks, barber, waiters, etc. Once you see these people more than once and become a familiar face, they will be willing to start conversations with you. This is a good time to ask about the social life around your area. If you say you are new to the area, that is even better. Most people really want to help.
However, if your issue is a bit deeper and is caused by feeling depressed, that is going to hinder your efforts to meet people and develop a social life. It doesn't mean you can't, it just makes it a bit harder. If you feel depressed and think it is caused by your recent losses (which is completely normal), then pushing yourself to go out and meet new people is a good way to help yourself recover. There is no harm in feeling bad about your recent losses. It is normal to mourn over losses, even if they are good ones like moving away to a new place. It is particularly appropriate to feel depressed when you lose friends and a relationship at the same time. You have had numerous losses and stressors in your life recently. It often takes a while to adjust, and mild, short term depression can be part of that.
If you find that your depression is getting to the point you cannot function, please seek out the help of a therapist. Short term Cognitive Behavioral Therapy (CBT) can help you recover quickly and get back to feeling better. You can talk with your doctor (if you have a new one yet) or if you attend church, your pastor can help with a referral. Also, look up the local community mental health center. You can get a referral from them or see a therapist at the center. They will do an evaluation and determine exactly what your diagnosis is and help you get treatment.
I hope this helped you,