I have never had a gf till date. there is a girl who likes me but she's ugly. should i go out with her to make myself feel better? or should i wait?

Acceptance: If people enjoy each others company and accept each other for who they are, they are likely to be a good match. Trying to make yourself feel better without regard for the other person is short cut to unhappiness for both.

Go out with her: not just to make yourself feel better. Remember beauty and/or ugly is only skin deep. You might find that you really like her as a person. As you come to know a person, you can see skin deep, and it is not unusual to see that person in a different light. If it ends up that you don't come to like her, at least you will have had the experience of going out with a girl. Good luck!