Success is not one days job but one mans job
Its very difficult for a startups to make everyone happy. I mean your friends or investors everyone want favours.
But as per my experiance things have to move, whether someone help you or not. Right attitude for such time would be to tell them that
"Its not like nothing is impossible.
Something have to move and it will. If you dont join the team, you lose it not the team.
Team has to go and it will for sure alone or with you. Team earns, team gets, team taste and you are just alone.Years after you are part of croud and team stands apart. And than the time you think to join the team, its too late.
Its better to join now than to never."
But whoever help you whether your friens, investor or anyone dont forget to reward them.
There are 3 type of people in Business. One who laugh at you, one who praise but dont bother and one who look at you with hope.
3rd one are the best. Never let them down. Second one are to be heard only. And 1st one should be heard carefully as they indirectly motivates you(You get motivated to prove them you were right and they were useless)