I don't know what's going on with my friends?

i planned some nights out,BBQs etc with my 7mates.I got drinks 4them etc only 4them 2let me down&all dropped out last min.theyv done this 3times.they then made plans 4their house on same nite what I was goin 2do etc.im always havin 2go all the way 2theirs everytime&pay 4taxis home etc.(they all live in same street)yes its easier 4just 1person 2go2 theirs instead of them comin 2me but it wouldnt hurt them 2come 2mine once in a while(its cheap enough 4them all 2get taxi together than it is 4 1person etc).im not askin 4them 2come 2mine all the time!i wanted 2start at mine 4my birthday then go out(its a couple mins walk 2town)but they said theyd rather start at theirs b4 goin out etc! I dont mind payin now&again to go to theirs etc but it's EVERY time we hav a nite out etc,I always hav 2meet at theirs instead of just meeting them(I live 2mins walk from town where we go out etc,they live 20mins away).theres been a few times iv paid nearly �10 to get to theirs&iv been there 5mins&they r waitin 4taxi etc.this means comin all the way back down right next to where I live!i told em 1 night that I would just meet them in town&they werent happy so I went 2theirs&within 15mins we were in a taxi headin out.I no some people readin this will think Im bein selfish but how would u feel if u felt u had 2do all the running 2their house all the time&fork out money(buses not an option&i can't drive as epileptic) on taxis etc.I always make the effort 2go 2theirs but they never make the effort 2come 2mine or even meet me halfway by just lettin me meet them in town etc.Weve been mates 6yrs&theyve never been 2my house!I asked them once&they said they just find it easier 2start at theirs which I can understand but would it really hurt em if they made the effort just once 2come 2mine? they r good mates but im tired of doin the runnin all the time&it feels unfair!I'm tired of feelin like theres something wrong etc! another mate feels the same way!any advice please?no nasty replys!