Gf too clingy

I discussed with her the matter but she was pretty defensive. I feel sometimes I need my personal space and alone time. What can I do?

More context please.

Tell her you just need some space sometimes. It might upset her for a little while but the relationship will be better off in the whole if she knows it bothers you.

That's what I did and it did not end well. but thanks anyway.

Also, she asks for cuddles/kisses all the time, sometimes I just want to chill but if I say no, then I would feel like an horrible person.

What happend?

Yeah, I would just be candid about how you feel, otherwise it might turn toxic. I did the same with my girl, she was constantly texting me non-stop when we first decided to date. So I eventually told her to stop! And she got upset and threatened to text other guys who will give her attention. But it is what it is, and she eventually calmed down.

Some girls are very lonely and insecure, so they cling onto what they fear they might lose, because of lack of self confidence. But you need to be straight up with her, regardless of the consequences.

She said she was offended (via text) and then ignored my texts.

She should respect your personal space. She should also be mature enough to not flat out ignore you when you're talking about something she simply doesnt want to hear.
Next time tell her in person rather than over the phone and see how it goes. It can be hard to judge someone's tone over text, she could have mistaken it.

She knew that saying she'd txt other dudes was a "threat" and so do you... well there's no hope here. U r done whether over this, or the next prob.

She knew that saying she'd txt other dudes was a "threat" and so do you... well there's no hope here. U r done whether over this, or the next prob.