Is it normal that i still love my ex after 4 months after she dumped me?

It's very normal, and it may last a long time. One of the best things you can do to get over an ex is get out there and date again. Sitting home alone moping is not healthy or smart.
Your ex is gone, long gone and even if she came back, chances are the relationship wouldn't work again. Move on, you will find a better gf, guarantied.

I still sometimes think of my ex and we split like 2 years ago. We still speak sometimes but sometimes I just think about what if we were still together.

It's completely normal. The relationship is still fresh in your mind.

Normal. It could last a lifetime on some levels. Best to move on, but don't be afraid to enjoy some memories.

I broke up with my ex over a year ago and I can't stop thinking about her. It's such an inconvenience . . .