The best way to not be clingy is... well, it's a catch-22 in some ways. If you feel secure in your relationship, then you won't be as clingy. But if you're not feeling secure, deciding, "Oh, I'm fine" isn't likely to work. Also, it may be that you need different things than your partner, affection-display-wise. Some people need their space. Some people need touching. You may be two perfectly good people who are just not actually suited to have a relationship with each other!
(For an example: introverts tend to "Recharge" by being alone. Extroverts "recharge" by being with other people. Extroverts are very draining to introverts! I should know -- I'm more introverted than not, and I have an extrovert kid! Waugh!)
Another issue is y'all's support structures. It sounds like you only have HIM. No other friends, no family? That's a lot of pressure on him, especially if he is dealing with his own issues at the same time. Basically, he can't be expected to have the "spoons" to cope with giving you everything you NEED, because... it's almost impossible for any one person to do that, even if two people don't have other issues to deal with.
Can you access some form of counseling that will help you sort out what you Need from your partner, versus what needs you can get filled in other ways, by other people?
(And, finally, please go read youarenotcrazy.com -- because there is the possibility that you are with someone who is only able to feel secure when he's standing on the emotions of others. "Don't be dramatic" is not a helpful response. It may simply be someone dealing with his own issues, who is unable to be helpful, but it's basically dismissing your emotions in a way that makes you more upset and insecure, and you don't have anyone else except him. Emotional abusers thrive on having a victim who can't go anywhere else. ...your relationship may not be toxic in that fashion, but I really think it's important that you take a good, hard look, just in case it's sliding in that direction.)
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(For an example: introverts tend to "Recharge" by being alone. Extroverts "recharge" by being with other people. Extroverts are very draining to introverts! I should know -- I'm more introverted than not, and I have an extrovert kid! Waugh!)
Another issue is y'all's support structures. It sounds like you only have HIM. No other friends, no family? That's a lot of pressure on him, especially if he is dealing with his own issues at the same time. Basically, he can't be expected to have the "spoons" to cope with giving you everything you NEED, because... it's almost impossible for any one person to do that, even if two people don't have other issues to deal with.
Can you access some form of counseling that will help you sort out what you Need from your partner, versus what needs you can get filled in other ways, by other people?
(And, finally, please go read youarenotcrazy.com -- because there is the possibility that you are with someone who is only able to feel secure when he's standing on the emotions of others. "Don't be dramatic" is not a helpful response. It may simply be someone dealing with his own issues, who is unable to be helpful, but it's basically dismissing your emotions in a way that makes you more upset and insecure, and you don't have anyone else except him. Emotional abusers thrive on having a victim who can't go anywhere else. ...your relationship may not be toxic in that fashion, but I really think it's important that you take a good, hard look, just in case it's sliding in that direction.)
Good luck!