If no aliens then god?

I am currently seventeen and was not raised in a very religious family. We never really talked about what happens when you die, my parents just said they believe in heaven thats perty much it.. so as a young kid i search for meaning and purpose in this life.. i like to think i took an equal look at both sides, allthogh how could i im 17? the side i looked at first was religions that believed there is some sort of god, and everything that ever made sense in their ways relied on pure faith or could be proved wrong with science, but then i thought what if there is things in this life that we just are not ment to undertstand, which is basicaly what religion says… but would you really want just go on doing the norm and find out later that science was really our way to eternal life and there is no after life… would really suck to be given this great life like religion says it is but for it to be wasted by misinterperted messeges. and by this i mean the very real and becoming more realised fact that being given these lifes is our chance at eternal life right there, we don’t need to wait for it to be over to go into some sort of unseen spirit form, when we could use the things we have and know, and what we have an know is that we are now closer than ever the being able to recreate life and if we look at it now that we can then we have to believe that other life could have done it before us… when i look how they explain everything in the past, its all the words of men who could do nothing but believe well not it has come the age where we can know longer believe but understand… is it really that hard to believe that aliens could have been mistaked for gods? what is a god? a supream being with ways beyond our understanding… i think aliens would have that and i sure and hell bet it seemed that way to people with no ounce of technology.. SOOOO this leaves me at this thoo… it truly scares me to believe that aliens do exsist and if we don’t find a way here to live on then its over when we die… so by realising this i have come to the conclusion i can continue on blieving in aliens and what not but if in the future, turns on they don’t come and we don’t find them… then really before i die i must say i sure as hell know i would start praying.. but what if its too late then did i miss the cut off?? and if i don’t believe in aliens do i have to turn to god? To turn to god would that be submitting my self to his will? im not totally sure but the question im mainly asking is can you have a fullfilled life with out religion because i cannot see my life with religion everything crosses somthign els out no one is right and i don’t want to be on the wrong side of the fence… BTW i have looked at evolution, just some scientist found a gene called p53, not sure if its real or not but if it is then it cancles out evolution, because p53 is said to be a anti mutate gene