Awesome that you have a new house! Wohoo! What a great opportunity to open it up to some new friends, invite all the neighbors! Who cares if anyone shows up or not? (Most likely they will.) Just have fun. Oh, and it would be a good excuse to get all the boxes unpacked. lol!
On a more serious note... I have the same fear issues with friends so I understand. What my husband tries to explain to me is that even though I feel our friends don't always like me, that isn't the case. (This feeling is more prominent when I am depressed.) Maybe you should talk to your significant other to find out more positive aspects of your personality, you know to give yourself a confidence boost.
Oh, and through experience the easiest way to bring people closer to you is be relate-able, and after a while open up (add personal experiences). Say when you are talking in conversation with a co-worker and they say: "Today is my mom's b-day." You could ask about their mom then recount a funny/ironic story about your mom/a birthday. Instant personal connection. The two people I always feel are my friends I started and continue this type of banter with. I know it seems somewhat formulated but it works.