Should I continue trying to be friends with this person?

[crazybex2006]

I met a new friend through a club I joined several months ago. She was lovely and we use to have a laugh, we decided it would be fun to start a business together - we entered a competition where we had to make as much profit as we could, ended up getting picked but didn't make it to the finals.
I know she blames me that we lost but I think it was just the product wasn't of interest to the judge.
Afterwards we had loads of stock left so I booked us into a few markets, I was determine to sell it and really wanted to continue with the business. However I ended up going to the events on my own as she kept making excuses of why she couldn't come, so I finally gave up as I felt like I was doing all the work (didn't say that to her) just said I don't want this business venture to ruin our friendship which is what it was doing.
We both arrange a nightout with the rest of the club, things seemed ok again. She was a little quiet at first but came up to me and said she missed hanging around together.
A few weeks after I ask if she wanted to go to the cinema or for a few drinks, we decided to go to the cinema but she dropped out last minute with an excuse so I took my son instead, went to krispy cremes and watched ice age 4 so I wasn't too bothered.
It was her birthday the following week so I sent her a present and card, partly cas I wanted to let her know there were no hard feelings.
Then I found out she took another girl from the group to the cinema to see what we were going to see a few days after we were suppose to, so was a little annoyed.
Then she invited me to her birthday party on facebook but I noticed the event had been up for a while so I'm guessing she either forgot to invite me or more likely felt guilty cas I sent her a present?! couldn't go cas I was at a wedding the next day.
I did get invited to her son's party and I was one of two from the club that came and stayed, mostly family there though.
Spoke to her a few times but never had chance to meet up as it seemed to be someones birthday every weekend (which I invited her to as she's new to town and doesn't know many people)
Found out again that she arranged a nightout with a few girls from the club we hang around with but didn't invite me, so again was annoyed.
We've got a club nightout in 2 weeks which I plan on going, she arranged it so will be there.
What should I do? Am I just overthinking things? Do you think she doing these thing to spite me or is just a drifter trying to meet as many people as possible?

[MikeWazowski]

It sounds like you've been very nice to her and have tried to maintain the friendship. If she keeps ignoring and rejecting you, maybe you should let her make the next step. If she doesn't, then you may be wasting time and effort.

[Fearne]

No your making an effort and she's not forget her!!