Is it normal to feel frustrated?

Hi ladies I would like some advice please.

I'm 26 years old and I've never had a "serious" relationship. All the guys I've dated either played with my heart or chose someone else over me. Or sometimes when I think something good is going, something happens and I end up back at square one. I guess I'm a bit frustrated now because at my age I thought I would have had someone serious by now or just be able to say that I've had a serious relationship.

 It also doesn't help that I feel very lonely sometimes. I live on a small island and the dating pool here is very small and somewhat limited. Now I know that having a boyfriend is not the end all or all that life has to offer but sometimes I can't help but feel frustrated with God because I'm yet to meet someone. Is it normal to feel like this?