How do I make friends while dealing with an attention seeker?

I haven't had friends for almost 4 years now. After I broke up with my ex I became very closed off with people and didn't trust anyone anymore. I live in my house with my family but my sister and her husband live in front of my house while I live in an apartment in the back. When I was dating my ex he was cheating on me the whole time and he is friends with my sister's husband. My sister's husband I noticed now has always been an attention seeker. He is "charismatic" but more like wanting to be the center of attention. I honestly don't like him since I knew he knew what my ex was doing the whole time. I can't trust him as far as I can throw him and my sister always takes his side. Well I want to make friends now and my mom tells me I can bring whoever I want to the house but truth is I don't want my sister or her husband to be around any of my friends. I have forgiven them but the betrayal I went through is part of my life and I do speak about it with others and they know how I upset I was. I think my sister's husband is just as twofaced and conniving as my ex. Where do I meet people to hang out without wasting money? I feel like the people that are having affairs haha but then again where do they hang out at? I dont have a car by the way so that takes that option out.

How do I make friends while dealing with an attention seeker?
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